Merge pull request #95 from Ebullioscopic/feature/lock-screen

Reminder Live Activity and Lock Screen Widget

DynamicIsland/ContentView.swift

@@ -21,6 +21,7 @@ struct ContentView: View {
     @ObservedObject var coordinator = DynamicIslandViewCoordinator.shared
     @ObservedObject var musicManager = MusicManager.shared
     @ObservedObject var timerManager = TimerManager.shared
+    @ObservedObject var reminderManager = ReminderLiveActivityManager.shared
     @ObservedObject var batteryModel = BatteryStatusViewModel.shared
     @ObservedObject var statsManager = StatsManager.shared
     @ObservedObject var recordingManager = ScreenRecordingManager.shared
@@ -34,6 +35,7 @@ struct ContentView: View {
     @Default(.showGpuGraph) var showGpuGraph
     @Default(.showNetworkGraph) var showNetworkGraph
     @Default(.showDiskGraph) var showDiskGraph
+    @Default(.enableReminderLiveActivity) var enableReminderLiveActivity
     
     // Dynamic sizing based on view type and graph count with smooth transitions
     var dynamicNotchSize: CGSize {
@@ -404,13 +406,15 @@ struct ContentView: View {
                             .frame(width: 76, alignment: .trailing)
                         }
                         .frame(height: vm.effectiveClosedNotchHeight + (isHovering ? 8 : 0), alignment: .center)
-                      } else if coordinator.sneakPeek.show && Defaults[.inlineHUD] && (coordinator.sneakPeek.type != .music) && (coordinator.sneakPeek.type != .battery) && (coordinator.sneakPeek.type != .volume || vm.notchState == .closed) {
+                      } else if coordinator.sneakPeek.show && Defaults[.inlineHUD] && (coordinator.sneakPeek.type != .music) && (coordinator.sneakPeek.type != .battery) && (coordinator.sneakPeek.type != .timer) && (coordinator.sneakPeek.type != .reminder) && (coordinator.sneakPeek.type != .volume || vm.notchState == .closed) {
                           InlineHUD(type: $coordinator.sneakPeek.type, value: $coordinator.sneakPeek.value, icon: $coordinator.sneakPeek.icon, hoverAnimation: $isHovering, gestureProgress: $gestureProgress)
                               .transition(.opacity)
                       } else if (!coordinator.expandingView.show || coordinator.expandingView.type == .music) && vm.notchState == .closed && (musicManager.isPlaying || !musicManager.isPlayerIdle) && coordinator.musicLiveActivityEnabled && !vm.hideOnClosed && !lockScreenManager.isLocked {
                           MusicLiveActivity()
                       } else if (!coordinator.expandingView.show || coordinator.expandingView.type == .timer) && vm.notchState == .closed && timerManager.isTimerActive && coordinator.timerLiveActivityEnabled && !vm.hideOnClosed {
                           TimerLiveActivity()
+                      } else if (!coordinator.expandingView.show || coordinator.expandingView.type == .reminder) && vm.notchState == .closed && reminderManager.isActive && enableReminderLiveActivity && !vm.hideOnClosed {
+                          ReminderLiveActivity()
                       } else if (!coordinator.expandingView.show || coordinator.expandingView.type == .recording) && vm.notchState == .closed && (recordingManager.isRecording || !recordingManager.isRecorderIdle) && Defaults[.enableScreenRecordingDetection] && !vm.hideOnClosed {
                           RecordingLiveActivity()
                       } else if (!coordinator.expandingView.show || coordinator.expandingView.type == .doNotDisturb) && vm.notchState == .closed && doNotDisturbManager.isDoNotDisturbActive && Defaults[.enableDoNotDisturbDetection] && Defaults[.showDoNotDisturbIndicator] && !vm.hideOnClosed && !lockScreenManager.isLocked {
@@ -465,6 +469,25 @@ struct ContentView: View {
                                   .padding(.bottom, 10)
                               }
                           }
+                          else if coordinator.sneakPeek.type == .reminder {
+                              if !vm.hideOnClosed && Defaults[.sneakPeekStyles] == .standard, let reminder = reminderManager.activeReminder {
+                                  GeometryReader { geo in
+                                      let chipColor = Color(nsColor: reminder.event.calendar.color).ensureMinimumBrightness(factor: 0.7)
+                                      HStack(spacing: 6) {
+                                          RoundedRectangle(cornerRadius: 2)
+                                              .fill(chipColor)
+                                              .frame(width: 8, height: 12)
+                                          MarqueeText(
+                                              .constant(reminderSneakPeekText(for: reminder, now: reminderManager.currentDate)),
+                                              textColor: reminderColor(for: reminder, now: reminderManager.currentDate),
+                                              minDuration: 1,
+                                              frameWidth: max(0, geo.size.width - 14)
+                                          )
+                                      }
+                                  }
+                                  .padding(.bottom, 10)
+                              }
+                          }
                       }
                   }
               }
@@ -505,6 +528,43 @@ struct ContentView: View {
           }
       }
 
+    private func reminderColor(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> Color {
+        let window = TimeInterval(Defaults[.reminderSneakPeekDuration])
+        let remaining = reminder.event.start.timeIntervalSince(now)
+        if window > 0 && remaining > 0 && remaining <= window {
+            return .red
+        }
+        return Color(nsColor: reminder.event.calendar.color).ensureMinimumBrightness(factor: 0.7)
+    }
+
+    private func reminderSneakPeekText(for entry: ReminderLiveActivityManager.ReminderEntry, now: Date) -> String {
+        let title = entry.event.title.isEmpty ? "Upcoming Reminder" : entry.event.title
+        let remaining = max(entry.event.start.timeIntervalSince(now), 0)
+        let window = TimeInterval(Defaults[.reminderSneakPeekDuration])
+
+        if window > 0 && remaining <= window {
+            return "\(title) • now"
+        }
+
+        let minutes = Int(ceil(remaining / 60))
+        let timeString = reminderTimeFormatter.string(from: entry.event.start)
+
+        if minutes <= 0 {
+            return "\(title) • now • \(timeString)"
+        } else if minutes == 1 {
+            return "\(title) • in 1 min • \(timeString)"
+        } else {
+            return "\(title) • in \(minutes) min • \(timeString)"
+        }
+    }
+
+    private let reminderTimeFormatter: DateFormatter = {
+        let formatter = DateFormatter()
+        formatter.dateStyle = .none
+        formatter.timeStyle = .short
+        return formatter
+    }()
+
     @ViewBuilder
     func DynamicIslandFaceAnimation() -> some View {
         HStack {

DynamicIsland/DynamicIslandViewCoordinator.swift

@@ -19,6 +19,7 @@ enum SneakContentType {
     case battery
     case download
     case timer
+    case reminder
     case recording
     case doNotDisturb
     case bluetoothAudio
@@ -143,8 +144,17 @@ class DynamicIslandViewCoordinator: ObservableObject {
     }
     
     func toggleSneakPeek(status: Bool, type: SneakContentType, duration: TimeInterval = 1.5, value: CGFloat = 0, icon: String = "") {
-        sneakPeekDuration = duration
+        let resolvedDuration: TimeInterval
-        if type != .music && type != .timer {
+        switch type {
+        case .timer:
+            resolvedDuration = 10
+        case .reminder:
+            resolvedDuration = Defaults[.reminderSneakPeekDuration]
+        default:
+            resolvedDuration = duration
+        }
+        sneakPeekDuration = resolvedDuration
+        if type != .music && type != .timer && type != .reminder {
             // close()
             if !hudReplacement {
                 return

DynamicIsland/Localizable.xcstrings

@@ -868,6 +868,14 @@
         }
       }
     },
+    "%lld min" : {
+      "comment" : "A text label displaying the current value of the \"Notify before\" slider. The argument is the current value of the slider, expressed in minutes.",
+      "isCommentAutoGenerated" : true
+    },
+    "%lld s" : {
+      "comment" : "A text view displaying the duration of the \"sneak peek\" feature in the reminder live activity section of the calendar settings view. The text is followed by a unit of measurement (\"s\").",
+      "isCommentAutoGenerated" : true
+    },
     "%lld%%" : {
       "localizations" : {
         "ar" : {
@@ -4725,6 +4733,10 @@
         }
       }
     },
+    "Chip color" : {
+      "comment" : "A label for the color of the chip in the lock screen reminder widget.",
+      "isCommentAutoGenerated" : true
+    },
     "Choose a custom sound file that will play when the timer completes. Supported formats: MP3, M4A, WAV, AIFF." : {
       "extractionState" : "stale",
       "localizations" : {
@@ -5634,6 +5646,10 @@
         }
       }
     },
+    "Countdown style" : {
+      "comment" : "A label for the style of countdown to use when reminders are live.",
+      "isCommentAutoGenerated" : true
+    },
     "CPU Usage" : {
       "localizations" : {
         "fr" : {
@@ -10543,6 +10559,10 @@
     },
     "Lock screen material" : {
 
+    },
+    "Lock Screen Reminder Widget" : {
+      "comment" : "A section header for the lock screen reminder widget settings.",
+      "isCommentAutoGenerated" : true
     },
     "Loop Mode" : {
 
@@ -14238,6 +14258,10 @@
         }
       }
     },
+    "Notify before" : {
+      "comment" : "A label describing the slider that allows the user to set a reminder lead time.",
+      "isCommentAutoGenerated" : true
+    },
     "OK" : {
       "localizations" : {
         "ar" : {
@@ -15329,6 +15353,10 @@
         }
       }
     },
+    "Reminder Live Activity" : {
+      "comment" : "A section header that lists the options related to live activity notifications for reminders.",
+      "isCommentAutoGenerated" : true
+    },
     "Reminders" : {
       "localizations" : {
         "fr" : {
@@ -17161,6 +17189,10 @@
       "comment" : "A description of how the color-coding feature works.",
       "isCommentAutoGenerated" : true
     },
+    "Sneak peek duration" : {
+      "comment" : "A label describing the duration of the \"sneak peek\" feature in the calendar settings.",
+      "isCommentAutoGenerated" : true
+    },
     "Sneak Peek shows the media title and artist under the notch for a few seconds." : {
       "localizations" : {
         "ar" : {

DynamicIsland/components/Calendar/ReminderLiveActivity.swift

@@ -0,0 +1,222 @@
+//
+//  ReminderLiveActivity.swift
+//  DynamicIsland
+//
+//  Created by GitHub Copilot on 2025-11-12.
+//
+
+import SwiftUI
+import Defaults
+
+#if canImport(AppKit)
+import AppKit
+private typealias ReminderFont = NSFont
+#elseif canImport(UIKit)
+import UIKit
+private typealias ReminderFont = UIFont
+#endif
+
+struct ReminderLiveActivity: View {
+    @EnvironmentObject var vm: DynamicIslandViewModel
+    @ObservedObject var manager = ReminderLiveActivityManager.shared
+
+    @Default(.reminderPresentationStyle) private var presentationStyle
+
+    private let wingPadding: CGFloat = 16
+    private let ringStrokeWidth: CGFloat = 3
+
+    private var notchContentHeight: CGFloat {
+        max(0, vm.effectiveClosedNotchHeight)
+    }
+
+    var body: some View {
+        if let reminder = manager.activeReminder {
+            content(for: reminder, now: manager.currentDate)
+                .transition(.opacity.combined(with: .move(edge: .bottom)))
+        }
+    }
+
+    @ViewBuilder
+    private func content(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> some View {
+        HStack(spacing: 0) {
+            Color.clear
+                .frame(width: leftWingWidth, height: notchContentHeight)
+                .background(alignment: .leading) {
+                    iconSection(for: reminder, now: now)
+                        .padding(.leading, wingPadding / 2)
+                        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
+                }
+
+            Rectangle()
+                .fill(.black)
+                .frame(width: vm.closedNotchSize.width, height: notchContentHeight)
+
+            Color.clear
+                .frame(width: rightWingWidth(for: reminder, now: now), height: notchContentHeight)
+                .background(alignment: .trailing) {
+                    rightSection(for: reminder, now: now)
+                        .padding(.trailing, wingPadding / 2)
+                        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .trailing)
+                }
+        }
+        .frame(height: notchContentHeight, alignment: .center)
+    }
+
+    private func iconSection(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> some View {
+        let diameter = iconDiameter
+        let accent = accentColor(for: reminder, now: now)
+
+        return Image(systemName: iconName(for: reminder, now: now))
+            .font(.system(size: 16, weight: .semibold))
+            .foregroundStyle(accent)
+            .frame(width: diameter, height: diameter)
+            .frame(width: iconDiameter, height: notchContentHeight, alignment: .center)
+    }
+
+    @ViewBuilder
+    private func rightSection(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> some View {
+        let accent = accentColor(for: reminder, now: now)
+        switch presentationStyle {
+        case .ringCountdown:
+            ringCountdownSection(for: reminder, now: now, accent: accent)
+        case .digital:
+            digitalSection(for: reminder, now: now, accent: accent)
+        case .minutes:
+            minutesSection(for: reminder, now: now, accent: accent)
+        }
+    }
+
+    private func ringCountdownSection(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date, accent: Color) -> some View {
+        let progressValue = progress(for: reminder, now: now)
+        let diameter = ringDiameter
+
+        return ZStack {
+            Circle()
+                .stroke(Color.white.opacity(0.15), lineWidth: ringStrokeWidth)
+            Circle()
+                .trim(from: 0, to: progressValue)
+                .stroke(accent, style: StrokeStyle(lineWidth: ringStrokeWidth, lineCap: .round))
+                .rotationEffect(.degrees(-90))
+                .animation(.smooth(duration: 0.25), value: progressValue)
+        }
+        .frame(width: diameter, height: diameter)
+        .frame(height: notchContentHeight, alignment: .center)
+    }
+
+    private func digitalSection(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date, accent: Color) -> some View {
+        let countdown = digitalCountdown(for: reminder, now: now)
+        return Text(countdown)
+            .font(.system(size: 16, weight: .semibold, design: .monospaced))
+            .foregroundColor(accent)
+            .contentTransition(.numericText())
+            .animation(.smooth(duration: 0.25), value: countdown)
+            .frame(height: notchContentHeight, alignment: .center)
+    }
+
+    private func minutesSection(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date, accent: Color) -> some View {
+        VStack(alignment: .trailing, spacing: 2) {
+            Text(minutesCountdown(for: reminder, now: now))
+                .font(.system(size: 13, weight: .semibold))
+                .foregroundColor(accent)
+        }
+        .frame(height: notchContentHeight, alignment: .center)
+    }
+
+    private func progress(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> Double {
+        guard reminder.leadTime > 0 else { return 1 }
+        let remaining = max(reminder.event.start.timeIntervalSince(now), 0)
+        let elapsed = reminder.leadTime - remaining
+        let ratio = elapsed / reminder.leadTime
+        return min(max(ratio, 0), 1)
+    }
+
+    private func digitalCountdown(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> String {
+        let remaining = max(reminder.event.start.timeIntervalSince(now), 0)
+        let totalSeconds = Int(remaining.rounded(.down))
+        let minutes = totalSeconds / 60
+        let seconds = totalSeconds % 60
+        return String(format: "%02d:%02d", minutes, seconds)
+    }
+
+    private func minutesCountdown(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> String {
+        let remaining = max(reminder.event.start.timeIntervalSince(now), 0)
+        let minutes = max(1, Int(ceil(remaining / 60)))
+        return minutes == 1 ? "in 1 min" : "in \(minutes) min"
+    }
+
+    private func accentColor(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> Color {
+        if isCritical(for: reminder, now: now) {
+            return .red
+        }
+        return Color(nsColor: reminder.event.calendar.color).ensureMinimumBrightness(factor: 0.7)
+    }
+
+    private var leftWingWidth: CGFloat {
+        wingPadding + iconDiameter
+    }
+
+    private func rightWingWidth(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> CGFloat {
+        var width = wingPadding
+        switch presentationStyle {
+        case .ringCountdown:
+            width += ringDiameter
+        case .digital:
+            width += countdownWidth(for: reminder, now: now)
+        case .minutes:
+            width += minutesWidth(for: reminder, now: now)
+        }
+        return width
+    }
+
+    private func countdownWidth(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> CGFloat {
+        let text = digitalCountdown(for: reminder, now: now)
+        let width = measureTextWidth(text, font: monospacedDigitFont(size: 16, weight: ReminderFont.Weight.semibold))
+        return max(width + 18, 76)
+    }
+
+    private func minutesWidth(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> CGFloat {
+        let text = minutesCountdown(for: reminder, now: now)
+        let width = measureTextWidth(text, font: systemFont(size: 13, weight: ReminderFont.Weight.semibold))
+        return max(width + 18, 88)
+    }
+
+    private var iconDiameter: CGFloat {
+        max(notchContentHeight - 8, 26)
+    }
+
+    private var ringDiameter: CGFloat {
+        max(min(notchContentHeight - 12, 22), 16)
+    }
+
+    private func measureTextWidth(_ text: String, font: ReminderFont) -> CGFloat {
+        let attributes: [NSAttributedString.Key: Any] = [.font: font]
+        return ceil(NSAttributedString(string: text, attributes: attributes).size().width)
+    }
+
+    private func systemFont(size: CGFloat, weight: ReminderFont.Weight) -> ReminderFont {
+        #if canImport(AppKit)
+        return NSFont.systemFont(ofSize: size, weight: weight)
+        #else
+        return UIFont.systemFont(ofSize: size, weight: weight)
+        #endif
+    }
+
+    private func monospacedDigitFont(size: CGFloat, weight: ReminderFont.Weight) -> ReminderFont {
+        #if canImport(AppKit)
+        return NSFont.monospacedDigitSystemFont(ofSize: size, weight: weight)
+        #else
+        return UIFont.monospacedDigitSystemFont(ofSize: size, weight: weight)
+        #endif
+    }
+
+    private func iconName(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> String {
+        isCritical(for: reminder, now: now) ? ReminderLiveActivityManager.criticalIconName : ReminderLiveActivityManager.standardIconName
+    }
+
+    private func isCritical(for reminder: ReminderLiveActivityManager.ReminderEntry, now: Date) -> Bool {
+        let window = TimeInterval(Defaults[.reminderSneakPeekDuration])
+        guard window > 0 else { return false }
+        let remaining = reminder.event.start.timeIntervalSince(now)
+        return remaining > 0 && remaining <= window
+    }
+}

DynamicIsland/components/LockScreen/LockScreenReminderWidget.swift

@@ -0,0 +1,106 @@
+import SwiftUI
+
+struct LockScreenReminderWidget: View {
+    let snapshot: LockScreenReminderWidgetSnapshot
+
+    private let primaryFont = Font.system(size: 19, weight: .semibold, design: .rounded)
+    private let iconSize: CGFloat = 20
+    private let chipWidth: CGFloat = 9
+
+    var body: some View {
+        HStack(alignment: .center, spacing: 8) {
+            Image(systemName: snapshot.iconName)
+                .font(.system(size: iconSize, weight: .semibold))
+                .foregroundStyle(Color.white)
+
+            RoundedRectangle(cornerRadius: 2)
+                .fill(chipColor)
+                .frame(width: chipWidth, height: iconSize)
+
+            Text(snapshot.title)
+                .font(primaryFont)
+                .foregroundStyle(primaryTextColor)
+                .lineLimit(1)
+                .minimumScaleFactor(0.85)
+                .allowsTightening(true)
+                .layoutPriority(1)
+                .frame(height: iconSize, alignment: .center)
+
+            if let relative = snapshot.relativeDescription {
+                Text("•")
+                    .font(primaryFont)
+                    .foregroundStyle(separatorColor)
+                    .frame(height: iconSize, alignment: .center)
+
+                Text(relative)
+                    .font(primaryFont)
+                    .foregroundStyle(secondaryTextColor)
+                    .lineLimit(1)
+                    .minimumScaleFactor(0.85)
+                    .allowsTightening(true)
+                    .layoutPriority(0.75)
+                    .frame(height: iconSize, alignment: .center)
+            }
+
+            Text("•")
+                .font(primaryFont)
+                .foregroundStyle(separatorColor)
+                .frame(height: iconSize, alignment: .center)
+
+            Text(snapshot.eventTimeText)
+                .font(primaryFont)
+                .foregroundStyle(secondaryTextColor)
+                .lineLimit(1)
+                .minimumScaleFactor(0.85)
+                .allowsTightening(true)
+                .layoutPriority(0.75)
+                .frame(height: iconSize, alignment: .center)
+        }
+        .padding(.horizontal, 16)
+        .padding(.vertical, 12)
+        .frame(minWidth: 240, idealWidth: 360, maxWidth: 520, alignment: .leading)
+        .foregroundStyle(Color.white)
+        .background(Color.clear)
+        .shadow(color: .black.opacity(0.3), radius: 8, x: 0, y: 3)
+        .accessibilityElement(children: .ignore)
+        .accessibilityLabel(accessibilityLabel)
+    }
+
+    private var accentColor: Color {
+        snapshot.isCritical ? .red : snapshot.accent.color
+    }
+
+    private var chipColor: Color {
+        if snapshot.isCritical {
+            return .red
+        }
+        switch snapshot.chipStyle {
+        case .eventColor:
+            return accentColor.ensureMinimumBrightness(factor: 0.7)
+        case .monochrome:
+            return Color.white.opacity(0.85)
+        }
+    }
+
+    private var primaryTextColor: Color {
+        Color.white.opacity(0.92)
+    }
+
+    private var secondaryTextColor: Color {
+        snapshot.isCritical ? Color.white : Color.white.opacity(0.78)
+    }
+
+    private var separatorColor: Color {
+        Color.white.opacity(0.65)
+    }
+
+    private var accessibilityLabel: String {
+        var components: [String] = [snapshot.title]
+        if let relative = snapshot.relativeDescription {
+            components.append(relative)
+        }
+        components.append(snapshot.eventTimeText)
+        return components.joined(separator: ", ")
+    }
+}
+

DynamicIsland/components/Settings/SettingsView.swift

@@ -953,6 +953,12 @@ struct Media: View {
 struct CalendarSettings: View {
     @ObservedObject private var calendarManager = CalendarManager.shared
     @Default(.showCalendar) var showCalendar: Bool
+    @Default(.enableReminderLiveActivity) var enableReminderLiveActivity
+    @Default(.reminderPresentationStyle) var reminderPresentationStyle
+    @Default(.reminderLeadTime) var reminderLeadTime
+    @Default(.reminderSneakPeekDuration) var reminderSneakPeekDuration
+    @Default(.enableLockScreenReminderWidget) var enableLockScreenReminderWidget
+    @Default(.lockScreenReminderChipStyle) var lockScreenReminderChipStyle
 
     var body: some View {
         Form {
@@ -997,6 +1003,59 @@ struct CalendarSettings: View {
                 
                 Defaults.Toggle("Show calendar", key: .showCalendar)
                 
+                Section(header: Text("Reminder Live Activity")) {
+                    Defaults.Toggle("Enable reminder live activity", key: .enableReminderLiveActivity)
+
+                    Picker("Countdown style", selection: $reminderPresentationStyle) {
+                        ForEach(ReminderPresentationStyle.allCases) { style in
+                            Text(style.displayName).tag(style)
+                        }
+                    }
+                    .pickerStyle(.segmented)
+                    .disabled(!enableReminderLiveActivity)
+
+                    HStack {
+                        Text("Notify before")
+                        Slider(
+                            value: Binding(
+                                get: { Double(reminderLeadTime) },
+                                set: { reminderLeadTime = Int($0) }
+                            ),
+                            in: 1...60,
+                            step: 1
+                        )
+                        .disabled(!enableReminderLiveActivity)
+                        Text("\(reminderLeadTime) min")
+                            .foregroundStyle(.secondary)
+                            .frame(width: 60, alignment: .trailing)
+                    }
+
+                    HStack {
+                        Text("Sneak peek duration")
+                        Slider(
+                            value: $reminderSneakPeekDuration,
+                            in: 3...20,
+                            step: 1
+                        )
+                        .disabled(!enableReminderLiveActivity)
+                        Text("\(Int(reminderSneakPeekDuration)) s")
+                            .foregroundStyle(.secondary)
+                            .frame(width: 60, alignment: .trailing)
+                    }
+                }
+
+                Section(header: Text("Lock Screen Reminder Widget")) {
+                    Defaults.Toggle("Show lock screen reminder", key: .enableLockScreenReminderWidget)
+
+                    Picker("Chip color", selection: $lockScreenReminderChipStyle) {
+                        ForEach(LockScreenReminderChipStyle.allCases) { style in
+                            Text(style.rawValue).tag(style)
+                        }
+                    }
+                    .pickerStyle(.segmented)
+                    .disabled(!enableLockScreenReminderWidget || !enableReminderLiveActivity)
+                }
+
                 Section(header: Text("Select Calendars")) {
                     List {
                         ForEach(calendarManager.allCalendars, id: \.id) { calendar in

DynamicIsland/enums/generic.swift

@@ -125,3 +125,10 @@ enum LockScreenWeatherTemperatureUnit: String, CaseIterable, Defaults.Serializab
         }
     }
 }
+
+enum LockScreenReminderChipStyle: String, CaseIterable, Defaults.Serializable, Identifiable {
+    case eventColor = "Event color"
+    case monochrome = "White"
+
+    var id: String { rawValue }
+}

DynamicIsland/managers/CalendarManager.swift

@@ -64,15 +64,20 @@ class CalendarManager: ObservableObject {
 
     func checkCalendarAuthorization() async {
         let status = EKEventStore.authorizationStatus(for: .event)
+        let reminderStatus = EKEventStore.authorizationStatus(for: .reminder)
         DispatchQueue.main.async {
             print("📅 Current calendar authorization status: \(status)")
             self.calendarAuthorizationStatus = status
+            self.reminderAuthorizationStatus = reminderStatus
         }
 
         switch status {
         case .notDetermined:
             let granted = await calendarService.requestAccess()
-            self.calendarAuthorizationStatus = granted ? .fullAccess : .denied
+            let newEventStatus = EKEventStore.authorizationStatus(for: .event)
+            let newReminderStatus = EKEventStore.authorizationStatus(for: .reminder)
+            self.calendarAuthorizationStatus = newEventStatus
+            self.reminderAuthorizationStatus = newReminderStatus
             if granted {
                 await reloadCalendarAndReminderLists()
                 events = await calendarService.events(

DynamicIsland/managers/LockScreenManager.swift

@@ -105,6 +105,7 @@ class LockScreenManager: ObservableObject {
         LockScreenPanelManager.shared.showPanel()
         LockScreenLiveActivityWindowManager.shared.showLocked()
         LockScreenWeatherManager.shared.showWeatherWidget()
+        LockScreenReminderWidgetManager.shared.showReminderWidget()
         
         // THEN trigger lock icon in Dynamic Island (only if enabled in settings)
         if Defaults[.enableLockScreenLiveActivity] {
@@ -125,6 +126,7 @@ class LockScreenManager: ObservableObject {
         LockScreenPanelManager.shared.hidePanel()
         LockScreenLiveActivityWindowManager.shared.showUnlockAndScheduleHide()
         LockScreenWeatherManager.shared.hideWeatherWidget()
+        LockScreenReminderWidgetManager.shared.hideReminderWidget()
         
         // Update state immediately
         if Defaults[.enableLockScreenLiveActivity] {

DynamicIsland/managers/LockScreenPanelManager.swift

@@ -20,6 +20,7 @@ class LockScreenPanelManager {
     private var collapsedFrame: NSRect?
     private let collapsedPanelCornerRadius: CGFloat = 28
     private let expandedPanelCornerRadius: CGFloat = 52
+    private(set) var latestFrame: NSRect?
 
     private init() {
         print("[\(timestamp())] LockScreenPanelManager: initialized")
@@ -79,6 +80,7 @@ class LockScreenPanelManager {
         }
 
         window.setFrame(targetFrame, display: true)
+        latestFrame = targetFrame
         let hosting = NSHostingView(rootView: LockScreenMusicPanel())
         hosting.frame = NSRect(origin: .zero, size: targetFrame.size)
         window.contentView = hosting
@@ -123,6 +125,8 @@ class LockScreenPanelManager {
             window.setFrame(targetFrame, display: true)
         }
 
+        latestFrame = targetFrame
+
         // Update corner radius to match the SwiftUI panel's style
         let targetRadius = expanded ? expandedPanelCornerRadius : collapsedPanelCornerRadius
         if animated {
@@ -146,6 +150,8 @@ class LockScreenPanelManager {
         window.orderOut(nil)
         window.contentView = nil
 
+        latestFrame = nil
+
         print("[\(timestamp())] LockScreenPanelManager: panel hidden")
     }
 }

DynamicIsland/managers/LockScreenReminderWidgetManager.swift

@@ -0,0 +1,209 @@
+import Foundation
+import Combine
+import Defaults
+import SwiftUI
+import AppKit
+
+@MainActor
+final class LockScreenReminderWidgetManager: ObservableObject {
+    static let shared = LockScreenReminderWidgetManager()
+
+    @Published private(set) var snapshot: LockScreenReminderWidgetSnapshot?
+
+    private let reminderManager = ReminderLiveActivityManager.shared
+    private var cancellables = Set<AnyCancellable>()
+
+    private let timeFormatter: DateFormatter = {
+        let formatter = DateFormatter()
+        formatter.dateStyle = .none
+        formatter.timeStyle = .short
+        return formatter
+    }()
+
+    private init() {
+        observeReminderUpdates()
+        observeDefaults()
+    }
+
+    func showReminderWidget() {
+        guard Defaults[.enableLockScreenReminderWidget] else {
+            LockScreenReminderWidgetPanelManager.shared.hide()
+            return
+        }
+
+        if let snapshot {
+            LockScreenReminderWidgetPanelManager.shared.show(with: snapshot)
+        } else {
+            recomputeSnapshot(now: reminderManager.currentDate)
+            if let snapshot {
+                LockScreenReminderWidgetPanelManager.shared.show(with: snapshot)
+            } else {
+                LockScreenReminderWidgetPanelManager.shared.hide()
+            }
+        }
+    }
+
+    func hideReminderWidget() {
+        LockScreenReminderWidgetPanelManager.shared.hide()
+    }
+
+    private func observeReminderUpdates() {
+        reminderManager.$activeReminder
+            .receive(on: RunLoop.main)
+            .sink { [weak self] _ in
+                guard let self else { return }
+                self.recomputeSnapshot(now: self.reminderManager.currentDate)
+            }
+            .store(in: &cancellables)
+
+        reminderManager.$currentDate
+            .receive(on: RunLoop.main)
+            .sink { [weak self] now in
+                guard let self else { return }
+                self.recomputeSnapshot(now: now)
+            }
+            .store(in: &cancellables)
+    }
+
+    private func observeDefaults() {
+        Defaults.publisher(.enableLockScreenReminderWidget, options: [])
+            .sink { [weak self] change in
+                guard let self else { return }
+                if change.newValue {
+                    self.recomputeSnapshot(now: self.reminderManager.currentDate)
+                    self.showReminderWidgetIfPossible()
+                } else {
+                    self.snapshot = nil
+                    LockScreenReminderWidgetPanelManager.shared.hide()
+                }
+            }
+            .store(in: &cancellables)
+
+        Defaults.publisher(.lockScreenReminderChipStyle, options: [])
+            .sink { [weak self] _ in
+                guard let self else { return }
+                self.recomputeSnapshot(now: self.reminderManager.currentDate)
+            }
+            .store(in: &cancellables)
+    }
+
+    private func showReminderWidgetIfPossible() {
+        guard LockScreenManager.shared.currentLockStatus else { return }
+        guard Defaults[.enableLockScreenReminderWidget] else { return }
+        if let snapshot {
+            LockScreenReminderWidgetPanelManager.shared.show(with: snapshot)
+        } else {
+            LockScreenReminderWidgetPanelManager.shared.hide()
+        }
+    }
+
+    private func recomputeSnapshot(now: Date) {
+        guard Defaults[.enableLockScreenReminderWidget] else {
+            snapshot = nil
+            LockScreenReminderWidgetPanelManager.shared.hide()
+            return
+        }
+
+        guard let entry = reminderManager.activeReminder else {
+            snapshot = nil
+            LockScreenReminderWidgetPanelManager.shared.hide()
+            return
+        }
+
+        let snapshot = makeSnapshot(from: entry, now: now)
+        if self.snapshot != snapshot {
+            self.snapshot = snapshot
+        }
+        deliver(snapshot)
+    }
+
+    private func deliver(_ snapshot: LockScreenReminderWidgetSnapshot) {
+        guard LockScreenManager.shared.currentLockStatus else { return }
+        if LockScreenReminderWidgetPanelManager.shared.isVisible {
+            LockScreenReminderWidgetPanelManager.shared.update(with: snapshot)
+        } else {
+            LockScreenReminderWidgetPanelManager.shared.show(with: snapshot)
+        }
+    }
+
+    private func makeSnapshot(from entry: ReminderLiveActivityManager.ReminderEntry, now: Date) -> LockScreenReminderWidgetSnapshot {
+        let title = entry.event.title.isEmpty ? "Upcoming Reminder" : entry.event.title
+        let timeText = timeFormatter.string(from: entry.event.start)
+        let isCritical = criticalWindowContains(entry: entry, now: now)
+        let relative = relativeDescription(for: entry, now: now)
+        let accent = accentColor(for: entry, isCritical: isCritical)
+        let iconName = isCritical ? ReminderLiveActivityManager.criticalIconName : ReminderLiveActivityManager.standardIconName
+
+        return LockScreenReminderWidgetSnapshot(
+            title: title,
+            eventTimeText: timeText,
+            relativeDescription: relative,
+            accent: accent,
+            chipStyle: Defaults[.lockScreenReminderChipStyle],
+            isCritical: isCritical,
+            iconName: iconName
+        )
+    }
+
+    private func accentColor(for entry: ReminderLiveActivityManager.ReminderEntry, isCritical: Bool) -> LockScreenReminderWidgetSnapshot.RGBAColor {
+        if isCritical {
+            return LockScreenReminderWidgetSnapshot.RGBAColor(nsColor: .systemRed)
+        }
+
+        let boosted = Color(nsColor: entry.event.calendar.color).ensureMinimumBrightness(factor: 0.7)
+        return LockScreenReminderWidgetSnapshot.RGBAColor(nsColor: NSColor(boosted))
+    }
+
+    private func relativeDescription(for entry: ReminderLiveActivityManager.ReminderEntry, now: Date) -> String? {
+        let remaining = entry.event.start.timeIntervalSince(now)
+        if remaining <= 0 {
+            return "now"
+        }
+
+        let minutes = Int(ceil(remaining / 60))
+        if minutes <= 0 {
+            return "now"
+        }
+        if minutes == 1 {
+            return "in 1 min"
+        }
+        return "in \(minutes) min"
+    }
+
+    private func criticalWindowContains(entry: ReminderLiveActivityManager.ReminderEntry, now: Date) -> Bool {
+        let window = TimeInterval(Defaults[.reminderSneakPeekDuration])
+        guard window > 0 else { return false }
+        let remaining = entry.event.start.timeIntervalSince(now)
+        return remaining > 0 && remaining <= window
+    }
+}
+
+struct LockScreenReminderWidgetSnapshot: Equatable {
+    struct RGBAColor: Equatable {
+        let red: Double
+        let green: Double
+        let blue: Double
+        let alpha: Double
+
+        init(nsColor: NSColor) {
+            let color = nsColor.usingColorSpace(.sRGB) ?? nsColor
+            self.red = Double(color.redComponent)
+            self.green = Double(color.greenComponent)
+            self.blue = Double(color.blueComponent)
+            self.alpha = Double(color.alphaComponent)
+        }
+
+        var color: Color {
+            Color(red: red, green: green, blue: blue, opacity: alpha)
+        }
+    }
+
+    let title: String
+    let eventTimeText: String
+    let relativeDescription: String?
+    let accent: RGBAColor
+    let chipStyle: LockScreenReminderChipStyle
+    let isCritical: Bool
+    let iconName: String
+}
+

DynamicIsland/managers/LockScreenReminderWidgetPanelManager.swift

@@ -0,0 +1,108 @@
+import AppKit
+import SwiftUI
+import SkyLightWindow
+
+@MainActor
+final class LockScreenReminderWidgetPanelManager {
+    static let shared = LockScreenReminderWidgetPanelManager()
+
+    private var window: NSWindow?
+    private var hasDelegated = false
+
+    var isVisible: Bool {
+        window?.isVisible == true
+    }
+
+    private init() {}
+
+    func show(with snapshot: LockScreenReminderWidgetSnapshot) {
+        render(snapshot: snapshot, makeVisible: true)
+    }
+
+    func update(with snapshot: LockScreenReminderWidgetSnapshot) {
+        render(snapshot: snapshot, makeVisible: false)
+    }
+
+    func hide() {
+        guard let window else { return }
+        window.orderOut(nil)
+        window.contentView = nil
+    }
+
+    private func render(snapshot: LockScreenReminderWidgetSnapshot, makeVisible: Bool) {
+        guard let screen = NSScreen.main else { return }
+        if !makeVisible, window == nil {
+            return
+        }
+
+        let view = LockScreenReminderWidget(snapshot: snapshot)
+        let hostingView = NSHostingView(rootView: view)
+        let fittingSize = hostingView.fittingSize
+        hostingView.frame = NSRect(origin: .zero, size: fittingSize)
+
+        let window = ensureWindow()
+        window.setFrame(frame(for: fittingSize, on: screen), display: true)
+        window.contentView = hostingView
+
+        if makeVisible {
+            window.orderFrontRegardless()
+        }
+    }
+
+    private func ensureWindow() -> NSWindow {
+        if let window {
+            return window
+        }
+
+        let frame = NSRect(origin: .zero, size: CGSize(width: 220, height: 48))
+        let newWindow = NSWindow(
+            contentRect: frame,
+            styleMask: [.borderless, .nonactivatingPanel],
+            backing: .buffered,
+            defer: false
+        )
+
+        newWindow.isReleasedWhenClosed = false
+        newWindow.isOpaque = false
+        newWindow.backgroundColor = .clear
+        newWindow.hasShadow = false
+        newWindow.ignoresMouseEvents = true
+        newWindow.level = NSWindow.Level(rawValue: Int(CGShieldingWindowLevel()))
+        newWindow.collectionBehavior = [.canJoinAllSpaces, .stationary, .fullScreenAuxiliary]
+
+        window = newWindow
+        if !hasDelegated {
+            SkyLightOperator.shared.delegateWindow(newWindow)
+            hasDelegated = true
+        }
+        return newWindow
+    }
+
+    private func frame(for size: CGSize, on screen: NSScreen) -> NSRect {
+        let screenFrame = screen.frame
+        let originX = screenFrame.midX - (size.width / 2)
+        let musicTop = LockScreenPanelManager.shared.latestFrame?.maxY ?? (screenFrame.midY - 32)
+
+        let defaultWeatherBottom = screenFrame.midY + (screenFrame.height * 0.14)
+        let weatherBottom = LockScreenWeatherPanelManager.shared.latestFrame?.minY ?? min(screenFrame.maxY - 120, max(defaultWeatherBottom, musicTop + size.height + 80))
+
+        let marginAboveMusic: CGFloat = 16
+        let marginBelowWeather: CGFloat = 16
+
+        let constrainedWeatherBottom = max(weatherBottom, musicTop + size.height + marginAboveMusic + marginBelowWeather)
+        let centerY = (musicTop + constrainedWeatherBottom) / 2
+        let lowerBound = screenFrame.minY + 80
+        let upperBound = constrainedWeatherBottom - marginBelowWeather - size.height
+
+        var proposedY = centerY - (size.height / 2)
+        if proposedY < lowerBound {
+            proposedY = lowerBound
+        }
+        if upperBound > lowerBound {
+            proposedY = min(proposedY, upperBound)
+        }
+
+        return NSRect(x: originX, y: proposedY, width: size.width, height: size.height)
+    }
+}
+

DynamicIsland/managers/LockScreenWeatherPanelManager.swift

@@ -8,6 +8,7 @@ final class LockScreenWeatherPanelManager {
 
     private var window: NSWindow?
     private var hasDelegated = false
+    private(set) var latestFrame: NSRect?
 
     private init() {}
 
@@ -23,6 +24,7 @@ final class LockScreenWeatherPanelManager {
         guard let window else { return }
         window.orderOut(nil)
         window.contentView = nil
+        latestFrame = nil
     }
 
     private func render(snapshot: LockScreenWeatherSnapshot, makeVisible: Bool) {
@@ -39,6 +41,7 @@ final class LockScreenWeatherPanelManager {
         let targetFrame = frame(for: fittingSize, on: screen)
         let window = ensureWindow()
         window.setFrame(targetFrame, display: true)
+        latestFrame = targetFrame
         window.contentView = hostingView
 
         if makeVisible {

DynamicIsland/managers/ReminderLiveActivityManager.swift

@@ -0,0 +1,388 @@
+//
+//  ReminderLiveActivityManager.swift
+//  DynamicIsland
+//
+//  Created by GitHub Copilot on 2025-11-12.
+//
+
+import Combine
+import Defaults
+import EventKit
+import Foundation
+
+@MainActor
+final class ReminderLiveActivityManager: ObservableObject {
+    struct ReminderEntry: Equatable {
+        let event: EventModel
+        let triggerDate: Date
+        let leadTime: TimeInterval
+    }
+
+    static let shared = ReminderLiveActivityManager()
+    static let standardIconName = "calendar.badge.clock"
+    static let criticalIconName = "calendar.badge.exclamationmark"
+
+    @Published private(set) var activeReminder: ReminderEntry?
+    @Published private(set) var currentDate: Date = Date()
+
+    private var nextReminder: ReminderEntry?
+    private var cancellables = Set<AnyCancellable>()
+    private var tickerTask: Task<Void, Never>? { didSet { oldValue?.cancel() } }
+    private var evaluationTask: Task<Void, Never>?
+    private var fallbackRefreshTask: Task<Void, Never>?
+    private var refreshTask: Task<Void, Never>?
+    private var pendingRefreshTask: Task<Void, Never>?
+    private var pendingRefreshForce = false
+    private var pendingRefreshToken = UUID()
+    private var lastRefreshDate: Date?
+    private let minimumRefreshInterval: TimeInterval = 10
+    private let refreshDebounceInterval: TimeInterval = 0.3
+    private var refreshTaskToken = UUID()
+    private var hasShownCriticalSneakPeek = false
+
+    private let calendarService: CalendarServiceProviding
+    private let calendarManager = CalendarManager.shared
+
+    var isActive: Bool { activeReminder != nil }
+
+    private init(calendarService: CalendarServiceProviding = CalendarService()) {
+        self.calendarService = calendarService
+        setupObservers()
+        scheduleRefresh(force: true)
+    }
+
+    private func setupObservers() {
+        Defaults.publisher(.enableReminderLiveActivity, options: [])
+            .sink { [weak self] change in
+                guard let self else { return }
+                if change.newValue {
+                    self.scheduleRefresh(force: true)
+                } else {
+                    self.deactivateReminder()
+                }
+            }
+            .store(in: &cancellables)
+
+        Defaults.publisher(.reminderLeadTime, options: [])
+            .sink { [weak self] _ in
+                guard let self else { return }
+                self.scheduleRefresh(force: true)
+            }
+            .store(in: &cancellables)
+
+        Defaults.publisher(.reminderPresentationStyle, options: [])
+            .sink { [weak self] _ in
+                guard let self else { return }
+                // Presentation change does not alter scheduling, but ensure state publishes for UI updates.
+                if let reminder = self.activeReminder {
+                    self.activeReminder = reminder
+                }
+            }
+            .store(in: &cancellables)
+
+        calendarManager.$allCalendars
+            .sink { [weak self] _ in
+                guard let self else { return }
+                self.scheduleRefresh(force: true)
+            }
+            .store(in: &cancellables)
+
+        calendarManager.$events
+            .sink { [weak self] _ in
+                guard let self else { return }
+                self.scheduleRefresh(force: false)
+            }
+            .store(in: &cancellables)
+
+        NotificationCenter.default.publisher(for: .EKEventStoreChanged)
+            .sink { [weak self] _ in
+                guard let self else { return }
+                self.scheduleRefresh(force: true)
+            }
+            .store(in: &cancellables)
+    }
+
+    private func cancelAllTimers() {
+        tickerTask = nil
+        evaluationTask?.cancel()
+        evaluationTask = nil
+        fallbackRefreshTask?.cancel()
+        fallbackRefreshTask = nil
+        pendingRefreshTask?.cancel()
+        pendingRefreshTask = nil
+        pendingRefreshForce = false
+        refreshTask?.cancel()
+        refreshTask = nil
+    hasShownCriticalSneakPeek = false
+    }
+
+    private func deactivateReminder() {
+        nextReminder = nil
+        activeReminder = nil
+        cancelAllTimers()
+    }
+
+    private func selectedCalendarIDs() -> [String] {
+        calendarManager.allCalendars
+            .filter { calendarManager.getCalendarSelected($0) }
+            .map { $0.id }
+    }
+
+    private func shouldHide(_ event: EventModel) -> Bool {
+        if event.isAllDay && Defaults[.hideAllDayEvents] {
+            return true
+        }
+        if case let .reminder(completed) = event.type,
+           completed && Defaults[.hideCompletedReminders] {
+            return true
+        }
+        return false
+    }
+
+    private func makeEntry(from event: EventModel, leadMinutes: Int, referenceDate: Date) -> ReminderEntry? {
+        guard event.start > referenceDate else { return nil }
+        let leadSeconds = max(1, leadMinutes) * 60
+        let trigger = event.start.addingTimeInterval(TimeInterval(-leadSeconds))
+        return ReminderEntry(event: event, triggerDate: trigger, leadTime: TimeInterval(leadSeconds))
+    }
+
+    private func scheduleEvaluation(at date: Date) {
+        evaluationTask?.cancel()
+        let delay = date.timeIntervalSinceNow
+        guard delay > 0 else {
+            Task { await self.evaluateCurrentState(at: Date()) }
+            return
+        }
+
+        evaluationTask = Task { [weak self] in
+            guard let self else { return }
+            try? await Task.sleep(nanoseconds: UInt64(delay * 1_000_000_000))
+            await self.evaluateCurrentState(at: Date())
+        }
+    }
+
+    private func scheduleFallbackRefresh() {
+        fallbackRefreshTask?.cancel()
+        let delay: TimeInterval = 15 * 60
+        fallbackRefreshTask = Task { [weak self] in
+            guard let self else { return }
+            try? await Task.sleep(nanoseconds: UInt64(delay * 1_000_000_000))
+            await self.scheduleRefresh(force: true)
+        }
+    }
+
+    private func scheduleRefresh(force: Bool) {
+        pendingRefreshForce = pendingRefreshForce || force
+        pendingRefreshToken = UUID()
+        let token = pendingRefreshToken
+
+        refreshTask?.cancel()
+        pendingRefreshTask?.cancel()
+        pendingRefreshTask = Task { [weak self] in
+            guard let self else { return }
+            do {
+                try await Task.sleep(nanoseconds: UInt64(self.refreshDebounceInterval * 1_000_000_000))
+            } catch {
+                return
+            }
+            await self.executeScheduledRefresh(token: token)
+        }
+    }
+
+    private func executeScheduledRefresh(token: UUID) async {
+        guard pendingRefreshToken == token else { return }
+        pendingRefreshTask = nil
+
+        if Task.isCancelled {
+            return
+        }
+
+        let now = Date()
+        let force = pendingRefreshForce
+        if !force, let last = lastRefreshDate {
+            let elapsed = now.timeIntervalSince(last)
+            if elapsed < minimumRefreshInterval {
+                let remaining = max(minimumRefreshInterval - elapsed, refreshDebounceInterval)
+                pendingRefreshToken = UUID()
+                let nextToken = pendingRefreshToken
+                pendingRefreshTask = Task { [weak self] in
+                    guard let self else { return }
+                    do {
+                        try await Task.sleep(nanoseconds: UInt64(remaining * 1_000_000_000))
+                    } catch {
+                        return
+                    }
+                    await self.executeScheduledRefresh(token: nextToken)
+                }
+                return
+            }
+        }
+
+        pendingRefreshForce = false
+        lastRefreshDate = now
+
+        refreshTask?.cancel()
+        let taskToken = UUID()
+        refreshTaskToken = taskToken
+        let task = Task { [weak self] in
+            guard let self else { return }
+            await self.refreshUpcomingReminder(force: force)
+        }
+        refreshTask = task
+        defer {
+            if refreshTaskToken == taskToken {
+                refreshTask = nil
+            }
+        }
+        _ = try? await task.value
+    }
+
+    private func startTickerIfNeeded() {
+        guard tickerTask == nil else { return }
+        tickerTask = Task { [weak self] in
+            while let self, !Task.isCancelled {
+                await self.handleTick()
+                do {
+                    try await Task.sleep(for: .seconds(1))
+                } catch {
+                    break
+                }
+            }
+        }
+    }
+
+    private func stopTicker() {
+        tickerTask = nil
+    }
+
+    private func handleEntrySelection(_ entry: ReminderEntry?, referenceDate: Date) {
+        fallbackRefreshTask?.cancel()
+        nextReminder = entry
+        hasShownCriticalSneakPeek = false
+        Task { await self.evaluateCurrentState(at: referenceDate) }
+    }
+
+    private func refreshFromEvents(_ events: [EventModel], referenceDate: Date) {
+        let leadMinutes = Defaults[.reminderLeadTime]
+        let upcoming = events
+            .filter { !shouldHide($0) }
+            .compactMap { makeEntry(from: $0, leadMinutes: leadMinutes, referenceDate: referenceDate) }
+            .sorted { $0.triggerDate < $1.triggerDate }
+
+        guard let first = upcoming.first else {
+            deactivateReminder()
+            scheduleFallbackRefresh()
+            return
+        }
+
+        handleEntrySelection(first, referenceDate: referenceDate)
+    }
+
+    func refreshUpcomingReminder(force: Bool = false) async {
+        guard Defaults[.enableReminderLiveActivity] else {
+            deactivateReminder()
+            return
+        }
+
+        let now = Date()
+
+        if !force, let entry = nextReminder, entry.event.start > now {
+            await evaluateCurrentState(at: now)
+            return
+        }
+
+        let calendars = selectedCalendarIDs()
+        guard !calendars.isEmpty else {
+            deactivateReminder()
+            return
+        }
+
+        let windowEnd = Calendar.current.date(byAdding: .hour, value: 24, to: now) ?? now.addingTimeInterval(24 * 60 * 60)
+        let events = await calendarService.events(from: now, to: windowEnd, calendars: calendars)
+        await MainActor.run {
+            self.refreshFromEvents(events, referenceDate: now)
+        }
+    }
+
+    func evaluateCurrentState(at date: Date) async {
+        guard Defaults[.enableReminderLiveActivity] else {
+            deactivateReminder()
+            return
+        }
+
+        currentDate = date
+
+        guard var entry = nextReminder else {
+            activeReminder = nil
+            stopTicker()
+            return
+        }
+
+        if entry.event.start <= date {
+            activeReminder = nil
+            nextReminder = nil
+            stopTicker()
+            hasShownCriticalSneakPeek = false
+            scheduleRefresh(force: true)
+            return
+        }
+
+            if entry.triggerDate <= date {
+            if entry.triggerDate > entry.event.start {
+                entry = ReminderEntry(event: entry.event, triggerDate: entry.event.start, leadTime: entry.leadTime)
+                nextReminder = entry
+            }
+            if activeReminder != entry {
+                activeReminder = entry
+                DynamicIslandViewCoordinator.shared.toggleSneakPeek(
+                    status: true,
+                    type: .reminder,
+                    duration: Defaults[.reminderSneakPeekDuration],
+                    value: 0,
+                    icon: ReminderLiveActivityManager.standardIconName
+                )
+                hasShownCriticalSneakPeek = false
+            }
+
+            let criticalWindow = TimeInterval(Defaults[.reminderSneakPeekDuration])
+            let timeRemaining = entry.event.start.timeIntervalSince(date)
+            if criticalWindow > 0 && timeRemaining > 0 {
+                if timeRemaining <= criticalWindow {
+                    if !hasShownCriticalSneakPeek {
+                        let displayDuration = min(criticalWindow, max(timeRemaining - 2, 0))
+                        if displayDuration > 0 {
+                        DynamicIslandViewCoordinator.shared.toggleSneakPeek(
+                            status: true,
+                            type: .reminder,
+                            duration: displayDuration,
+                            value: 0,
+                            icon: ReminderLiveActivityManager.criticalIconName
+                        )
+                        hasShownCriticalSneakPeek = true
+                        }
+                    }
+                } else {
+                    hasShownCriticalSneakPeek = false
+                }
+            }
+            startTickerIfNeeded()
+        } else {
+            if activeReminder != nil {
+                activeReminder = nil
+            }
+            stopTicker()
+            hasShownCriticalSneakPeek = false
+            scheduleEvaluation(at: entry.triggerDate)
+        }
+    }
+
+    @MainActor
+    private func handleTick() async {
+        let now = Date()
+        if abs(currentDate.timeIntervalSince(now)) >= 0.5 {
+            currentDate = now
+        }
+        await evaluateCurrentState(at: now)
+    }
+
+}

DynamicIsland/models/Constants.swift

@@ -217,6 +217,22 @@ enum TimerProgressStyle: String, CaseIterable, Identifiable, Defaults.Serializab
     var id: String { rawValue }
 }
 
+enum ReminderPresentationStyle: String, CaseIterable, Identifiable, Defaults.Serializable {
+    case ringCountdown = "Ring"
+    case digital = "Digital"
+    case minutes = "Minutes"
+
+    var id: String { rawValue }
+
+    var displayName: String {
+        switch self {
+        case .ringCountdown: return "Ring"
+        case .digital: return "Digital"
+        case .minutes: return "Minutes"
+        }
+    }
+}
+
 // AI Model types for screen assistant
 enum AIModelProvider: String, CaseIterable, Identifiable, Defaults.Serializable {
     case gemini = "Gemini"
@@ -359,6 +375,7 @@ extension Defaults.Keys {
     // Enable lock screen media widget (shows the standalone panel when screen is locked)
     static let enableLockScreenMediaWidget = Key<Bool>("enableLockScreenMediaWidget", default: true)
     static let enableLockScreenWeatherWidget = Key<Bool>("enableLockScreenWeatherWidget", default: true)
+    static let enableLockScreenReminderWidget = Key<Bool>("enableLockScreenReminderWidget", default: true)
     static let lockScreenWeatherRefreshInterval = Key<TimeInterval>("lockScreenWeatherRefreshInterval", default: 30 * 60)
     static let lockScreenWeatherShowsLocation = Key<Bool>("lockScreenWeatherShowsLocation", default: true)
     static let lockScreenWeatherShowsCharging = Key<Bool>("lockScreenWeatherShowsCharging", default: true)
@@ -374,6 +391,7 @@ extension Defaults.Keys {
     static let lockScreenShowAppIcon = Key<Bool>("lockScreenShowAppIcon", default: false)
     static let lockScreenPanelShowsBorder = Key<Bool>("lockScreenPanelShowsBorder", default: true)
     static let lockScreenPanelUsesBlur = Key<Bool>("lockScreenPanelUsesBlur", default: true)
+    static let lockScreenReminderChipStyle = Key<LockScreenReminderChipStyle>("lockScreenReminderChipStyle", default: .eventColor)
     
         // MARK: Battery
     static let showPowerStatusNotifications = Key<Bool>("showPowerStatusNotifications", default: true)
@@ -442,6 +460,12 @@ extension Defaults.Keys {
     static let timerShowsLabel = Key<Bool>("timerShowsLabel", default: true)
     static let timerShowsProgress = Key<Bool>("timerShowsProgress", default: true)
     static let timerProgressStyle = Key<TimerProgressStyle>("timerProgressStyle", default: .bar)
+    
+    // MARK: Reminder Live Activity
+    static let enableReminderLiveActivity = Key<Bool>("enableReminderLiveActivity", default: true)
+    static let reminderPresentationStyle = Key<ReminderPresentationStyle>("reminderPresentationStyle", default: .ringCountdown)
+    static let reminderLeadTime = Key<Int>("reminderLeadTime", default: 5)
+    static let reminderSneakPeekDuration = Key<Double>("reminderSneakPeekDuration", default: 10)
     static let timerControlWindowEnabled = Key<Bool>("timerControlWindowEnabled", default: true)
     
     // MARK: ColorPicker Feature