diff --git a/LoopFollow/Watch/WatchCommandHandler.swift b/LoopFollow/Watch/WatchCommandHandler.swift
index 238e1d964..13de20152 100644
--- a/LoopFollow/Watch/WatchCommandHandler.swift
+++ b/LoopFollow/Watch/WatchCommandHandler.swift
@@ -56,6 +56,30 @@ final class WatchCommandHandler {
             return
         }
 
+        // Snoozing ahead needs no remote control: it changes LoopFollow's own alarms, like the
+        // Snoozer's "Snooze all".
+        if case let .snoozeAll(until) = command.action {
+            var configuration = Storage.shared.alarmConfiguration.value
+            if let until {
+                guard until > Date(), until <= Date().addingTimeInterval(24 * 3600) else {
+                    finish(false, "Choose a snooze of up to 24 hours.")
+                    return
+                }
+                // As on the phone: an alarm sounding now is snoozed as well.
+                if Observable.shared.currentAlarm.value != nil {
+                    AlarmManager.shared.performSnooze()
+                }
+                configuration.snoozeUntil = until
+                Storage.shared.alarmConfiguration.value = configuration
+                finish(true, "All alarms snoozed until \(until.formatted(date: .omitted, time: .shortened)).")
+            } else {
+                configuration.snoozeUntil = nil
+                Storage.shared.alarmConfiguration.value = configuration
+                finish(true, "Snooze ended. Alarms are active.")
+            }
+            return
+        }
+
         guard Storage.shared.watchRemoteCommands.value else {
             finish(false, "Commands from Apple Watch are turned off in LoopFollow's Remote settings.")
             return
@@ -130,7 +154,7 @@ final class WatchCommandHandler {
         case .cancelOverride:
             service.sendCancelOverrideNotification(completion: sent)
 
-        case .startTempTarget, .cancelTempTarget, .snoozeAlarm:
+        case .startTempTarget, .cancelTempTarget, .snoozeAlarm, .snoozeAll:
             finish(false, "This command is not available for Loop.")
         }
     }
@@ -206,7 +230,7 @@ final class WatchCommandHandler {
         case .cancelTempTarget:
             manager.sendCancelTempTargetPushNotification(completion: sent)
 
-        case .snoozeAlarm:
+        case .snoozeAlarm, .snoozeAll:
             finish(false, "Unknown request.")
         }
     }
diff --git a/LoopFollow/Watch/WatchSessionManager.swift b/LoopFollow/Watch/WatchSessionManager.swift
index 041169524..d8ce53431 100644
--- a/LoopFollow/Watch/WatchSessionManager.swift
+++ b/LoopFollow/Watch/WatchSessionManager.swift
@@ -52,6 +52,8 @@ final class WatchSessionManager: NSObject {
     private func observeSettings() {
         let triggers: [AnyPublisher<Void, Never>] = [
             Observable.shared.currentAlarm.$value.map { _ in () }.eraseToAnyPublisher(),
+            // "Snooze all" set or ended on the phone shows on the watch's snooze page at once.
+            Storage.shared.alarmConfiguration.$value.map { _ in () }.eraseToAnyPublisher(),
             Storage.shared.watchRemoteCommands.$value.map { _ in () }.eraseToAnyPublisher(),
             Storage.shared.remoteType.$value.map { _ in () }.eraseToAnyPublisher(),
             Storage.shared.colorBGText.$value.map { _ in () }.eraseToAnyPublisher(),
diff --git a/LoopFollow/Watch/WatchStateBuilder.swift b/LoopFollow/Watch/WatchStateBuilder.swift
index 12a379c99..83ebf45d7 100644
--- a/LoopFollow/Watch/WatchStateBuilder.swift
+++ b/LoopFollow/Watch/WatchStateBuilder.swift
@@ -67,6 +67,7 @@ enum WatchStateBuilder {
             stats: vc.map { stats($0.statsDisplayModel) },
             device: Storage.shared.device.value,
             alarm: currentAlarm(),
+            snoozeAllUntil: Storage.shared.alarmConfiguration.value.snoozeUntil.flatMap { $0 > now ? $0 : nil },
             remote: remoteConfig()
         )
     }
diff --git a/LoopFollowWatch/ContentView.swift b/LoopFollowWatch/ContentView.swift
index 5db091911..8b85b5cc4 100644
--- a/LoopFollowWatch/ContentView.swift
+++ b/LoopFollowWatch/ContentView.swift
@@ -48,6 +48,7 @@ struct ContentView: View {
                 TabView {
                     GlucosePage(state: state)
                     ChartPage(state: state)
+                    SnoozePage(state: state)
                     if let stats = state.stats {
                         StatsPage(state: state, stats: stats)
                     }
diff --git a/LoopFollowWatch/DirectCommandSender.swift b/LoopFollowWatch/DirectCommandSender.swift
index b2320524f..0f727812f 100644
--- a/LoopFollowWatch/DirectCommandSender.swift
+++ b/LoopFollowWatch/DirectCommandSender.swift
@@ -73,7 +73,7 @@ enum DirectCommandSender {
             payload.duration = Int(preset.durationSeconds / 60)
         case .cancelTempTarget:
             payload.commandType = .cancelTempTarget
-        case .snoozeAlarm:
+        case .snoozeAlarm, .snoozeAll:
             return (false, "Snoozing needs the iPhone.")
         }
 
@@ -121,7 +121,7 @@ enum DirectCommandSender {
             )
         case .cancelOverride:
             payload = LoopAPNSCommands.cancelOverridePayload(returnInfo: remote.returnNotification)
-        case .startTempTarget, .cancelTempTarget, .snoozeAlarm:
+        case .startTempTarget, .cancelTempTarget, .snoozeAlarm, .snoozeAll:
             return (false, "This command is not available for Loop.")
         }
 
diff --git a/LoopFollowWatch/SnoozePage.swift b/LoopFollowWatch/SnoozePage.swift
new file mode 100644
index 000000000..6b2c2683b
--- /dev/null
+++ b/LoopFollowWatch/SnoozePage.swift
@@ -0,0 +1,218 @@
+// LoopFollow
+// SnoozePage.swift
+
+import SwiftUI
+
+/// Snoozes all alarms ahead of time, as the phone's Snoozer does with "Snooze all":
+/// shows whether alarms are snoozed and for how long, and opens the snooze choices.
+///
+/// Modeled on Magnus Reintz's (t1dude) alarm snooze page for Trio's watch app
+/// (nightscout/Trio: "Add alarm snooze page to watch app", "Address watch snooze
+/// review feedback"): the bell in a circle with the minutes left, the snooze end
+/// below it, and a sheet with End Snooze and the durations.
+struct SnoozePage: View {
+    let state: WatchState
+
+    @EnvironmentObject private var session: WatchSession
+    @State private var showingOptions = false
+
+    var body: some View {
+        TimelineView(.periodic(from: .now, by: 15)) { context in
+            // Measured from now rather than the tick date, which can be stale (nightscout/Trio#1381).
+            let now = max(context.date, Date())
+            let until = state.snoozeAllUntil.flatMap { $0 > now ? $0 : nil }
+            let minutesLeft = until.map { max(Int(ceil($0.timeIntervalSince(now) / 60)), 0) } ?? 0
+
+            VStack(spacing: 8) {
+                Spacer(minLength: 0)
+                Button {
+                    showingOptions = true
+                } label: {
+                    VStack(spacing: 2) {
+                        Image(systemName: until == nil ? "bell.fill" : "bell.slash.fill")
+                            .font(.title2)
+                        if until != nil {
+                            Text(Self.remaining(minutesLeft))
+                                .font(.headline).fontWeight(.bold).fontDesign(.rounded)
+                        }
+                    }
+                    .foregroundStyle(until == nil ? Color.primary : Color.secondary)
+                    .frame(width: 80, height: 80)
+                    .overlay(Circle().stroke(Color.primary.opacity(0.4), lineWidth: 2))
+                }
+                .buttonStyle(.plain)
+
+                Text(until.map { "Snoozed until \($0.formatted(date: .omitted, time: .shortened))" } ?? "Alarms active")
+                    .font(.footnote)
+                    .foregroundStyle(.secondary)
+
+                if state.source == .watch {
+                    Text("Snoozing needs the iPhone")
+                        .font(.caption2)
+                        .foregroundStyle(.orange)
+                }
+                Spacer(minLength: 0)
+            }
+            .frame(maxWidth: .infinity, maxHeight: .infinity)
+            .accessibilityElement(children: .ignore)
+            .accessibilityLabel(Text("Alarms"))
+            .accessibilityValue(Text(until == nil ? "active" : "snoozed, \(minutesLeft) minutes remaining"))
+            .accessibilityHint(Text("Opens snooze options"))
+            .accessibilityAddTraits(.isButton)
+            .accessibilityAction { showingOptions = true }
+        }
+        .navigationTitle("Snooze")
+        .sheet(isPresented: $showingOptions) {
+            SnoozeOptionsView(snoozedUntil: state.snoozeAllUntil) {
+                showingOptions = false
+            }
+            .environmentObject(session)
+        }
+    }
+
+    /// "45 m" below an hour, "2 h 05" above.
+    static func remaining(_ minutes: Int) -> String {
+        minutes < 60 ? "\(minutes) m" : String(format: "%d h %02d", minutes / 60, minutes % 60)
+    }
+}
+
+/// End Snooze while snoozed, then the snooze durations and a chosen end time. The phone applies the choice
+/// and sends the new state back, so the page shows what the phone actually set.
+private struct SnoozeOptionsView: View {
+    let snoozedUntil: Date?
+    var onDone: () -> Void
+
+    @EnvironmentObject private var session: WatchSession
+    @State private var isSending = false
+    @State private var error: String?
+
+    private static let durations: [(label: String, minutes: Int)] = [
+        ("30 minutes", 30),
+        ("1 hour", 60),
+        ("2 hours", 120),
+        ("4 hours", 240),
+    ]
+
+    var body: some View {
+        let isSnoozed = (snoozedUntil ?? .distantPast) > Date()
+        NavigationStack {
+            List {
+                if isSnoozed {
+                    Button {
+                        send(until: nil)
+                    } label: {
+                        HStack(spacing: 8) {
+                            Image(systemName: "alarm.waves.left.and.right.fill")
+                            Text("End Snooze")
+                        }
+                    }
+                    .foregroundStyle(.white)
+                    .listRowBackground(Color.red.clipShape(RoundedRectangle(cornerRadius: 8)))
+
+                    // Like the phone's "+ 30m".
+                    Button("+ 30 minutes") {
+                        send(until: (snoozedUntil ?? Date()).addingTimeInterval(30 * 60))
+                    }
+                }
+
+                ForEach(Self.durations, id: \.minutes) { option in
+                    Button(option.label) {
+                        send(until: Date().addingTimeInterval(TimeInterval(option.minutes * 60)))
+                    }
+                }
+
+                NavigationLink("Until a time…") {
+                    SnoozeUntilTimeView(current: snoozedUntil) { end in
+                        send(until: end)
+                    }
+                }
+            }
+            .disabled(isSending)
+            .navigationTitle(isSending ? "Sending…" : "Snooze All")
+        }
+        .alert("Snooze failed", isPresented: Binding(get: { error != nil }, set: { if !$0 { error = nil } })) {
+            Button("OK", role: .cancel) {}
+        } message: {
+            Text(error ?? "")
+        }
+    }
+
+    private func send(until: Date?) {
+        Task {
+            isSending = true
+            let reply = await session.send(.snoozeAll(until: until))
+            isSending = false
+            if reply.success {
+                onDone()
+            } else {
+                error = reply.message
+            }
+        }
+    }
+}
+
+/// Snoozes until a time set with the Digital Crown (or − and +), in quarter hours: like the
+/// phone's snooze date and time, so 07:00 set in the evening means tomorrow morning. Turning
+/// on past midnight goes on into the next day, up to 24 hours ahead.
+private struct SnoozeUntilTimeView: View {
+    var onSnooze: (Date) -> Void
+    /// The quarter hour the choices count from: now, rounded up.
+    private let base: Date
+    /// Minutes after `base`, in steps of 15.
+    @State private var minutes: Double
+    @FocusState private var focused: Bool
+
+    init(current: Date?, onSnooze: @escaping (Date) -> Void) {
+        self.onSnooze = onSnooze
+        let base = Self.roundedUpToQuarter(Date())
+        self.base = base
+        // A running snooze's end, or an hour from now.
+        let start = current.map { $0.timeIntervalSince(base) / 60 } ?? 60
+        _minutes = State(initialValue: min(max((start / 15).rounded() * 15, Self.minimum), Self.maximum))
+    }
+
+    private static let minimum = 15.0
+    private static let maximum = 24.0 * 60 - 15
+
+    private var end: Date { base.addingTimeInterval(minutes * 60) }
+
+    var body: some View {
+        ScrollView {
+            VStack(spacing: 6) {
+                AmountField(
+                    value: $minutes,
+                    unit: "",
+                    step: 15,
+                    minimum: Self.minimum,
+                    maximum: Self.maximum,
+                    isHighlighted: focused,
+                    format: { base.addingTimeInterval($0 * 60).formatted(date: .omitted, time: .shortened) }
+                )
+                .focused($focused)
+                Text(Self.describe(end, now: Date()))
+                    .font(.footnote)
+                    .foregroundStyle(.secondary)
+                    .multilineTextAlignment(.center)
+                Label("Turn to change", systemImage: CrownSymbol.increase)
+                    .font(.caption2)
+                    .foregroundStyle(.secondary)
+                Button("Snooze") { onSnooze(end) }
+                    .buttonStyle(.borderedProminent)
+            }
+        }
+        .navigationTitle("Until")
+        .onAppear { focused = true }
+    }
+
+    /// "Today 23:30 · in 1 h 15" or "Tomorrow 07:00 · in 8 h 30".
+    static func describe(_ end: Date, now: Date) -> String {
+        let day = Calendar.current.isDate(end, inSameDayAs: now) ? "Today" : "Tomorrow"
+        let minutes = max(Int(ceil(end.timeIntervalSince(now) / 60)), 0)
+        return "\(day) \(end.formatted(date: .omitted, time: .shortened)) · in \(SnoozePage.remaining(minutes))"
+    }
+
+    static func roundedUpToQuarter(_ date: Date) -> Date {
+        let quarter: TimeInterval = 15 * 60
+        return Date(timeIntervalSinceReferenceDate: (date.timeIntervalSinceReferenceDate / quarter).rounded(.up) * quarter)
+    }
+}
diff --git a/LoopFollowWatch/StandaloneFetcher.swift b/LoopFollowWatch/StandaloneFetcher.swift
index 0617371c0..7df90dce4 100644
--- a/LoopFollowWatch/StandaloneFetcher.swift
+++ b/LoopFollowWatch/StandaloneFetcher.swift
@@ -150,6 +150,8 @@ enum StandaloneFetcher {
             stats: base?.stats,
             device: base?.device ?? "",
             alarm: nil,
+            // The phone's snooze, as last heard, so the snooze page keeps it while the phone is away.
+            snoozeAllUntil: base?.snoozeAllUntil,
             remote: remote
         )
     }
diff --git a/LoopFollowWatch/WatchSession.swift b/LoopFollowWatch/WatchSession.swift
index 1c7d97eac..3a9bd652a 100644
--- a/LoopFollowWatch/WatchSession.swift
+++ b/LoopFollowWatch/WatchSession.swift
@@ -117,8 +117,11 @@ final class WatchSession: NSObject, ObservableObject {
             case .notDelivered: break
             }
         }
-        if case .snoozeAlarm = action {
+        switch action {
+        case .snoozeAlarm, .snoozeAll:
             return WatchCommandReply(success: false, message: "Snoozing needs the iPhone, which is not reachable right now.")
+        default:
+            break
         }
         guard let credentials, let config = state?.remote else {
             return WatchCommandReply(success: false, message: "iPhone not reachable. Open LoopFollow on the iPhone and keep it near the watch.")
@@ -187,7 +190,7 @@ final class WatchSession: NSObject, ObservableObject {
             guard carbs > 0 else { return { _ in false } }
             let at = consumedAt.timeIntervalSince1970
             return { $0.carbs.contains { abs($0.t - at) < 5 * 60 && abs($0.v - carbs) < 0.5 } }
-        case .snoozeAlarm:
+        case .snoozeAlarm, .snoozeAll:
             return nil
         }
     }
diff --git a/Tests/WatchProtocolTests.swift b/Tests/WatchProtocolTests.swift
index ebb5231b0..58ee4e523 100644
--- a/Tests/WatchProtocolTests.swift
+++ b/Tests/WatchProtocolTests.swift
@@ -75,6 +75,8 @@ struct WatchProtocolTests {
             .startTempTarget(presetID: UUID().uuidString),
             .cancelTempTarget,
             .snoozeAlarm,
+            .snoozeAll(until: t0),
+            .snoozeAll(until: nil),
         ]
         for action in actions {
             let command = WatchCommand(action: action)
diff --git a/WatchShared/WatchCommand.swift b/WatchShared/WatchCommand.swift
index 5668fb463..d1a276e62 100644
--- a/WatchShared/WatchCommand.swift
+++ b/WatchShared/WatchCommand.swift
@@ -19,6 +19,8 @@ struct WatchCommand: Codable, Equatable {
         case startTempTarget(presetID: String)
         case cancelTempTarget
         case snoozeAlarm
+        /// Snoozes all alarms until the date, as the phone's "Snooze all" does; nil ends the snooze.
+        case snoozeAll(until: Date?)
     }
 
     let id: UUID
@@ -43,6 +45,7 @@ extension WatchCommand.Action {
         case .startTempTarget: "startTempTarget"
         case .cancelTempTarget: "cancelTempTarget"
         case .snoozeAlarm: "snoozeAlarm"
+        case .snoozeAll: "snoozeAll"
         }
     }
 
diff --git a/WatchShared/WatchState.swift b/WatchShared/WatchState.swift
index 91c73c69c..056da0629 100644
--- a/WatchShared/WatchState.swift
+++ b/WatchShared/WatchState.swift
@@ -39,6 +39,8 @@ struct WatchState: Codable, Equatable {
     var device: String
     /// The alarm currently sounding on the phone.
     var alarm: WatchAlarm?
+    /// While all alarms are snoozed on the phone (its "Snooze all"): until when.
+    var snoozeAllUntil: Date? = nil
     /// Present when remote commands from the watch are enabled on the phone.
     var remote: WatchRemoteConfig?