diff --git a/ios/ChronoMind/Shared/Location/LocationTriggerManager.swift b/ios/ChronoMind/Shared/Location/LocationTriggerManager.swift
new file mode 100644
index 0000000..877edcf
--- /dev/null
+++ b/ios/ChronoMind/Shared/Location/LocationTriggerManager.swift
@@ -0,0 +1,285 @@
+// ── Location Trigger Manager ──────────────────────────────────
+// CoreLocation geofencing for location-based timer triggers
+// Privacy-first: all processing on-device, no server tracking
+
+import Foundation
+import CoreLocation
+import Combine
+
+@MainActor
+final class LocationTriggerManager: NSObject, ObservableObject {
+    static let shared = LocationTriggerManager()
+
+    @Published var authorizationStatus: CLAuthorizationStatus = .notDetermined
+    @Published var savedLocations: [SavedLocation] = []
+    @Published var locationTriggers: [LocationTrigger] = []
+
+    private let locationManager = CLLocationManager()
+    private let locationsKey = "chronomind-saved-locations"
+    private let triggersKey = "chronomind-location-triggers"
+
+    override private init() {
+        super.init()
+        locationManager.delegate = self
+        locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
+        authorizationStatus = locationManager.authorizationStatus
+        loadData()
+    }
+
+    // MARK: - Authorization
+
+    func requestAlwaysAuthorization() {
+        locationManager.requestAlwaysAuthorization()
+    }
+
+    func requestWhenInUseAuthorization() {
+        locationManager.requestWhenInUseAuthorization()
+    }
+
+    // MARK: - Saved Locations
+
+    func addLocation(_ location: SavedLocation) {
+        savedLocations.append(location)
+        saveData()
+    }
+
+    func removeLocation(_ id: String) {
+        // Remove associated triggers first
+        let triggerIds = locationTriggers.filter { $0.locationId == id }.map(\.id)
+        for triggerId in triggerIds {
+            removeTrigger(triggerId)
+        }
+        savedLocations.removeAll { $0.id == id }
+        saveData()
+    }
+
+    func updateLocation(_ location: SavedLocation) {
+        if let index = savedLocations.firstIndex(where: { $0.id == location.id }) {
+            savedLocations[index] = location
+            saveData()
+        }
+    }
+
+    // MARK: - Triggers
+
+    func addTrigger(_ trigger: LocationTrigger) {
+        locationTriggers.append(trigger)
+        startMonitoring(trigger)
+        saveData()
+    }
+
+    func removeTrigger(_ id: String) {
+        if let trigger = locationTriggers.first(where: { $0.id == id }),
+           let location = savedLocations.first(where: { $0.id == trigger.locationId }) {
+            let region = CLCircularRegion(
+                center: CLLocationCoordinate2D(latitude: location.latitude, longitude: location.longitude),
+                radius: location.radius,
+                identifier: trigger.id
+            )
+            locationManager.stopMonitoring(for: region)
+        }
+        locationTriggers.removeAll { $0.id == id }
+        saveData()
+    }
+
+    // MARK: - Monitoring
+
+    private func startMonitoring(_ trigger: LocationTrigger) {
+        guard let location = savedLocations.first(where: { $0.id == trigger.locationId }) else { return }
+
+        let region = CLCircularRegion(
+            center: CLLocationCoordinate2D(latitude: location.latitude, longitude: location.longitude),
+            radius: location.radius,
+            identifier: trigger.id
+        )
+        region.notifyOnEntry = trigger.triggerType == .enter
+        region.notifyOnExit = trigger.triggerType == .exit
+
+        locationManager.startMonitoring(for: region)
+    }
+
+    func startAllMonitoring() {
+        for trigger in locationTriggers where trigger.enabled {
+            startMonitoring(trigger)
+        }
+    }
+
+    func stopAllMonitoring() {
+        for region in locationManager.monitoredRegions {
+            locationManager.stopMonitoring(for: region)
+        }
+    }
+
+    // MARK: - Current Location
+
+    func getCurrentLocation() async -> CLLocation? {
+        return await withCheckedContinuation { continuation in
+            let delegate = SingleLocationDelegate { location in
+                continuation.resume(returning: location)
+            }
+            let tempManager = CLLocationManager()
+            tempManager.delegate = delegate
+            tempManager.desiredAccuracy = kCLLocationAccuracyBest
+            tempManager.requestLocation()
+            // Hold reference
+            objc_setAssociatedObject(tempManager, "delegate", delegate, .OBJC_ASSOCIATION_RETAIN)
+        }
+    }
+
+    // MARK: - Persistence
+
+    private func loadData() {
+        if let data = UserDefaults.standard.data(forKey: locationsKey),
+           let decoded = try? JSONDecoder().decode([SavedLocation].self, from: data) {
+            savedLocations = decoded
+        }
+        if let data = UserDefaults.standard.data(forKey: triggersKey),
+           let decoded = try? JSONDecoder().decode([LocationTrigger].self, from: data) {
+            locationTriggers = decoded
+        }
+    }
+
+    private func saveData() {
+        if let data = try? JSONEncoder().encode(savedLocations) {
+            UserDefaults.standard.set(data, forKey: locationsKey)
+        }
+        if let data = try? JSONEncoder().encode(locationTriggers) {
+            UserDefaults.standard.set(data, forKey: triggersKey)
+        }
+    }
+}
+
+// MARK: - CLLocationManagerDelegate
+
+extension LocationTriggerManager: CLLocationManagerDelegate {
+    nonisolated func locationManagerDidChangeAuthorization(_ manager: CLLocationManager) {
+        Task { @MainActor in
+            authorizationStatus = manager.authorizationStatus
+            if manager.authorizationStatus == .authorizedAlways {
+                startAllMonitoring()
+            }
+        }
+    }
+
+    nonisolated func locationManager(_ manager: CLLocationManager, didEnterRegion region: CLRegion) {
+        Task { @MainActor in
+            handleRegionEvent(region.identifier, type: .enter)
+        }
+    }
+
+    nonisolated func locationManager(_ manager: CLLocationManager, didExitRegion region: CLRegion) {
+        Task { @MainActor in
+            handleRegionEvent(region.identifier, type: .exit)
+        }
+    }
+
+    nonisolated func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
+        // Silently handle — location is best-effort
+    }
+
+    private func handleRegionEvent(_ triggerId: String, type: LocationTriggerType) {
+        guard let trigger = locationTriggers.first(where: { $0.id == triggerId }),
+              trigger.enabled,
+              trigger.triggerType == type else { return }
+
+        // Post notification for TimerStore to handle
+        NotificationCenter.default.post(
+            name: .chronoMindLocationTriggerFired,
+            object: nil,
+            userInfo: [
+                "triggerId": triggerId,
+                "triggerType": type.rawValue,
+                "timerLabel": trigger.timerLabel,
+                "timerDuration": trigger.timerDurationSeconds ?? 0,
+            ]
+        )
+    }
+}
+
+// MARK: - Single Location Delegate Helper
+
+private class SingleLocationDelegate: NSObject, CLLocationManagerDelegate {
+    let completion: (CLLocation?) -> Void
+    init(completion: @escaping (CLLocation?) -> Void) {
+        self.completion = completion
+    }
+    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
+        completion(locations.first)
+    }
+    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
+        completion(nil)
+    }
+}
+
+// MARK: - Models
+
+struct SavedLocation: Codable, Identifiable {
+    let id: String
+    var name: String
+    var latitude: Double
+    var longitude: Double
+    var radius: Double // meters, default 100
+    var icon: String // SF Symbol name
+
+    init(name: String, latitude: Double, longitude: Double, radius: Double = 100, icon: String = "mappin.circle.fill") {
+        self.id = UUID().uuidString
+        self.name = name
+        self.latitude = latitude
+        self.longitude = longitude
+        self.radius = radius
+        self.icon = icon
+    }
+
+    static let presets: [(name: String, icon: String)] = [
+        ("Home", "house.fill"),
+        ("Work", "building.2.fill"),
+        ("Gym", "figure.run"),
+        ("School", "graduationcap.fill"),
+    ]
+}
+
+enum LocationTriggerType: String, Codable, CaseIterable, Identifiable {
+    case enter = "enter"
+    case exit = "exit"
+    var id: String { rawValue }
+
+    var label: String {
+        switch self {
+        case .enter: return "Arrive"
+        case .exit: return "Leave"
+        }
+    }
+}
+
+struct LocationTrigger: Codable, Identifiable {
+    let id: String
+    let locationId: String
+    let triggerType: LocationTriggerType
+    let timerLabel: String
+    let timerDurationSeconds: TimeInterval?
+    let timerUrgency: UrgencyLevel
+    var enabled: Bool
+
+    init(
+        locationId: String,
+        triggerType: LocationTriggerType,
+        timerLabel: String,
+        timerDurationSeconds: TimeInterval? = nil,
+        timerUrgency: UrgencyLevel = .standard,
+        enabled: Bool = true
+    ) {
+        self.id = UUID().uuidString
+        self.locationId = locationId
+        self.triggerType = triggerType
+        self.timerLabel = timerLabel
+        self.timerDurationSeconds = timerDurationSeconds
+        self.timerUrgency = timerUrgency
+        self.enabled = enabled
+    }
+}
+
+// MARK: - Notification Names
+
+extension Notification.Name {
+    static let chronoMindLocationTriggerFired = Notification.Name("chronoMindLocationTriggerFired")
+}
diff --git a/ios/ChronoMind/Shared/Location/TravelTimeManager.swift b/ios/ChronoMind/Shared/Location/TravelTimeManager.swift
new file mode 100644
index 0000000..c725366
--- /dev/null
+++ b/ios/ChronoMind/Shared/Location/TravelTimeManager.swift
@@ -0,0 +1,205 @@
+// ── Travel Time Manager ───────────────────────────────────────
+// MapKit-based travel time estimates for timer pre-warnings
+// Auto-adjusts cascade warnings based on real-time travel time
+
+import Foundation
+import MapKit
+import Combine
+
+@MainActor
+final class TravelTimeManager: ObservableObject {
+    static let shared = TravelTimeManager()
+
+    @Published var cachedEstimates: [String: TravelEstimate] = [:]
+
+    private init() {}
+
+    // MARK: - Travel Time Calculation
+
+    /// Calculate travel time between current location and a destination
+    func estimateTravelTime(
+        to destination: CLLocationCoordinate2D,
+        transportType: MKDirectionsTransportType = .automobile,
+        departureDate: Date? = nil
+    ) async -> TravelEstimate? {
+        guard let currentLocation = await LocationTriggerManager.shared.getCurrentLocation() else {
+            return nil
+        }
+
+        let request = MKDirections.Request()
+        request.source = MKMapItem(placemark: MKPlacemark(coordinate: currentLocation.coordinate))
+        request.destination = MKMapItem(placemark: MKPlacemark(coordinate: destination))
+        request.transportType = transportType
+        request.departureDate = departureDate
+
+        let directions = MKDirections(request: request)
+
+        do {
+            let response = try await directions.calculateETA()
+            let estimate = TravelEstimate(
+                travelTimeSeconds: response.expectedTravelTime,
+                distance: response.distance,
+                transportType: transportType,
+                calculatedAt: Date(),
+                departureDate: departureDate ?? Date(),
+                arrivalDate: Date().addingTimeInterval(response.expectedTravelTime)
+            )
+
+            return estimate
+        } catch {
+            return nil
+        }
+    }
+
+    /// Calculate travel time for a timer with a known destination
+    func estimateForTimer(
+        timerId: String,
+        destination: CLLocationCoordinate2D,
+        transportType: MKDirectionsTransportType = .automobile,
+        targetTime: Date
+    ) async -> TravelEstimate? {
+        // Calculate when to leave to arrive on time
+        guard let estimate = await estimateTravelTime(
+            to: destination,
+            transportType: transportType,
+            departureDate: targetTime.addingTimeInterval(-3600) // estimate departure ~1h before
+        ) else { return nil }
+
+        var result = estimate
+        result.timerId = timerId
+        result.leaveByTime = targetTime.addingTimeInterval(-estimate.travelTimeSeconds)
+
+        // Cache it
+        cachedEstimates[timerId] = result
+
+        return result
+    }
+
+    /// Generate adjusted cascade intervals based on travel time
+    func adjustedCascadeIntervals(
+        baseCascade: CascadeConfig,
+        travelTimeMinutes: Int
+    ) -> [Int] {
+        var intervals = getCascadeIntervals(baseCascade)
+
+        // Add travel-time-based warning if not already present
+        let travelWarning = travelTimeMinutes + 5 // 5 min buffer
+        if !intervals.contains(travelWarning) {
+            intervals.append(travelWarning)
+            intervals.sort(by: >)
+        }
+
+        // Add a "leave now" warning at exactly travel time
+        if !intervals.contains(travelTimeMinutes) {
+            intervals.append(travelTimeMinutes)
+            intervals.sort(by: >)
+        }
+
+        return intervals
+    }
+
+    /// Format a travel advisory message
+    func travelAdvisory(for estimate: TravelEstimate, timerLabel: String, targetTime: Date) -> String {
+        let travelMinutes = Int(estimate.travelTimeSeconds / 60)
+        let distanceKm = estimate.distance / 1000
+
+        let timeUntilLeave = (estimate.leaveByTime ?? Date()).timeIntervalSinceNow
+        let leaveMinutes = Int(timeUntilLeave / 60)
+
+        if leaveMinutes <= 0 {
+            return "Leave now for \(timerLabel) — \(travelMinutes) min \(estimate.transportLabel) (\(String(format: "%.1f", distanceKm)) km)"
+        } else {
+            return "\(timerLabel) in \(formatDurationCompact(targetTime.timeIntervalSinceNow)). Leave in \(leaveMinutes) min — \(travelMinutes) min \(estimate.transportLabel)"
+        }
+    }
+
+    // MARK: - Cache Management
+
+    func clearCache() {
+        cachedEstimates.removeAll()
+    }
+
+    func invalidateEstimate(for timerId: String) {
+        cachedEstimates.removeValue(forKey: timerId)
+    }
+}
+
+// MARK: - Travel Estimate Model
+
+struct TravelEstimate: Codable {
+    let travelTimeSeconds: TimeInterval
+    let distance: Double // meters
+    let transportType: TransportType
+    let calculatedAt: Date
+    let departureDate: Date
+    let arrivalDate: Date
+    var timerId: String?
+    var leaveByTime: Date?
+
+    var travelTimeMinutes: Int {
+        Int(travelTimeSeconds / 60)
+    }
+
+    var transportLabel: String {
+        transportType.label
+    }
+
+    // Wrapper for Codable MKDirectionsTransportType
+    init(
+        travelTimeSeconds: TimeInterval,
+        distance: Double,
+        transportType: MKDirectionsTransportType,
+        calculatedAt: Date,
+        departureDate: Date,
+        arrivalDate: Date
+    ) {
+        self.travelTimeSeconds = travelTimeSeconds
+        self.distance = distance
+        self.transportType = TransportType(from: transportType)
+        self.calculatedAt = calculatedAt
+        self.departureDate = departureDate
+        self.arrivalDate = arrivalDate
+    }
+}
+
+// MARK: - Transport Type (Codable wrapper)
+
+enum TransportType: String, Codable, CaseIterable, Identifiable {
+    case automobile = "driving"
+    case transit = "transit"
+    case walking = "walking"
+
+    var id: String { rawValue }
+
+    var label: String {
+        switch self {
+        case .automobile: return "drive"
+        case .transit: return "transit"
+        case .walking: return "walk"
+        }
+    }
+
+    var icon: String {
+        switch self {
+        case .automobile: return "car.fill"
+        case .transit: return "bus.fill"
+        case .walking: return "figure.walk"
+        }
+    }
+
+    var mkType: MKDirectionsTransportType {
+        switch self {
+        case .automobile: return .automobile
+        case .transit: return .transit
+        case .walking: return .walking
+        }
+    }
+
+    init(from mkType: MKDirectionsTransportType) {
+        switch mkType {
+        case .transit: self = .transit
+        case .walking: self = .walking
+        default: self = .automobile
+        }
+    }
+}