diff --git a/LoopFollow/Application/AppDelegate.swift b/LoopFollow/Application/AppDelegate.swift
index d79de7d18..62be95fd4 100644
--- a/LoopFollow/Application/AppDelegate.swift
+++ b/LoopFollow/Application/AppDelegate.swift
@@ -32,7 +32,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         }
 
         let action = UNNotificationAction(identifier: "OPEN_APP_ACTION", title: "Open App", options: .foreground)
-        let category = UNNotificationCategory(identifier: "loopfollow.background.alert", actions: [action], intentIdentifiers: [], options: [])
+        let category = UNNotificationCategory(identifier: BackgroundAlertIdentifier.categoryIdentifier, actions: [action], intentIdentifiers: [], options: [])
         UNUserNotificationCenter.current().setNotificationCategories([category])
 
         UNUserNotificationCenter.current().delegate = self
@@ -107,7 +107,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
     // Note: with scene-based lifecycle (iOS 13+), URLs are delivered to
     // SceneDelegate.scene(_:openURLContexts:) — not here. The scene delegate
-    // handles loopfollow://la-tap for Live Activity tap navigation.
+    // handles <urlScheme>://la-tap for Live Activity tap navigation.
 
     // MARK: UISceneSession Lifecycle
 
diff --git a/LoopFollow/Application/SceneDelegate.swift b/LoopFollow/Application/SceneDelegate.swift
index 3819a7ac6..e702db267 100644
--- a/LoopFollow/Application/SceneDelegate.swift
+++ b/LoopFollow/Application/SceneDelegate.swift
@@ -35,7 +35,7 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
     }
 
     func scene(_: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
-        guard URLContexts.contains(where: { $0.url.scheme == "loopfollow" && $0.url.host == "la-tap" }) else { return }
+        guard URLContexts.contains(where: { $0.url.scheme == AppGroupID.urlScheme && $0.url.host == "la-tap" }) else { return }
         // scene(_:openURLContexts:) fires after sceneDidBecomeActive when the app
         // foregrounds from background. Post on the next run loop so the view
         // hierarchy (including any presented modals) is fully settled.
diff --git a/LoopFollow/Controllers/BackgroundAlertManager.swift b/LoopFollow/Controllers/BackgroundAlertManager.swift
index d8a80b8f1..0ba3664b1 100644
--- a/LoopFollow/Controllers/BackgroundAlertManager.swift
+++ b/LoopFollow/Controllers/BackgroundAlertManager.swift
@@ -11,11 +11,24 @@ enum BackgroundAlertDuration: TimeInterval, CaseIterable {
     case eighteenMinutes = 1080 // 18 minutes in seconds
 }
 
-/// Enum representing unique identifiers for each background alert.
-enum BackgroundAlertIdentifier: String, CaseIterable {
-    case sixMin = "loopfollow.background.alert.6min"
-    case twelveMin = "loopfollow.background.alert.12min"
-    case eighteenMin = "loopfollow.background.alert.18min"
+/// Unique identifiers for each background alert, scoped to the current bundle
+/// so multiple LoopFollow instances don't interfere with each other's notifications.
+enum BackgroundAlertIdentifier: CaseIterable {
+    case sixMin
+    case twelveMin
+    case eighteenMin
+
+    private static let prefix = Bundle.main.bundleIdentifier ?? "loopfollow"
+
+    var rawValue: String {
+        switch self {
+        case .sixMin: "\(Self.prefix).background.alert.6min"
+        case .twelveMin: "\(Self.prefix).background.alert.12min"
+        case .eighteenMin: "\(Self.prefix).background.alert.18min"
+        }
+    }
+
+    static let categoryIdentifier = "\(prefix).background.alert"
 }
 
 class BackgroundAlertManager {
@@ -118,7 +131,7 @@ class BackgroundAlertManager {
         content.title = title
         content.body = body
         content.sound = .defaultCritical
-        content.categoryIdentifier = "loopfollow.background.alert"
+        content.categoryIdentifier = BackgroundAlertIdentifier.categoryIdentifier
         return content
     }
 
diff --git a/LoopFollow/Helpers/BackgroundRefreshManager.swift b/LoopFollow/Helpers/BackgroundRefreshManager.swift
index bac7e1c8e..a1168174d 100644
--- a/LoopFollow/Helpers/BackgroundRefreshManager.swift
+++ b/LoopFollow/Helpers/BackgroundRefreshManager.swift
@@ -8,7 +8,7 @@ class BackgroundRefreshManager {
     static let shared = BackgroundRefreshManager()
     private init() {}
 
-    private let taskIdentifier = "com.loopfollow.audiorefresh"
+    private let taskIdentifier = "\(Bundle.main.bundleIdentifier ?? "com.loopfollow").audiorefresh"
 
     func register() {
         BGTaskScheduler.shared.register(forTaskWithIdentifier: taskIdentifier, using: nil) { task in
diff --git a/LoopFollow/Info.plist b/LoopFollow/Info.plist
index 5cc7f4146..9e0f99340 100644
--- a/LoopFollow/Info.plist
+++ b/LoopFollow/Info.plist
@@ -7,7 +7,7 @@
 	<key>BGTaskSchedulerPermittedIdentifiers</key>
 	<array>
 		<string>com.$(unique_id).LoopFollow$(app_suffix)</string>
-		<string>com.loopfollow.audiorefresh</string>
+		<string>com.$(unique_id).LoopFollow$(app_suffix).audiorefresh</string>
 	</array>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
@@ -34,7 +34,7 @@
 		<dict>
 			<key>CFBundleURLSchemes</key>
 			<array>
-				<string>loopfollow</string>
+				<string>loopfollow$(app_suffix)</string>
 			</array>
 		</dict>
 	</array>
diff --git a/LoopFollow/LiveActivity/AppGroupID.swift b/LoopFollow/LiveActivity/AppGroupID.swift
index 6fc2bb9a6..5eb1187b8 100644
--- a/LoopFollow/LiveActivity/AppGroupID.swift
+++ b/LoopFollow/LiveActivity/AppGroupID.swift
@@ -20,19 +20,33 @@ enum AppGroupID {
     /// to force a shared base bundle id (recommended for reliability).
     private static let baseBundleIDPlistKey = "LFAppGroupBaseBundleID"
 
-    static func current() -> String {
+    /// The base bundle identifier for the main app, with extension suffixes stripped.
+    /// Usable from both the main app and extensions.
+    static var baseBundleID: String {
         if let base = Bundle.main.object(forInfoDictionaryKey: baseBundleIDPlistKey) as? String,
            !base.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
         {
-            return "group.\(base)"
+            return base
         }
-
         let bundleID = Bundle.main.bundleIdentifier ?? "unknown"
+        return stripLikelyExtensionSuffixes(from: bundleID)
+    }
 
-        // Heuristic: strip common extension suffixes so the extension can land on the main app’s group id.
-        let base = stripLikelyExtensionSuffixes(from: bundleID)
+    /// URL scheme derived from the bundle identifier. Works across app and extensions.
+    /// Default build: "loopfollow", second: "loopfollow2", third: "loopfollow3", etc.
+    static var urlScheme: String {
+        let base = baseBundleID
+        // Extract the suffix after "LoopFollow" in the bundle ID
+        // e.g. "com.TEAM.LoopFollow2" → "2", "com.TEAM.LoopFollow" → ""
+        if let range = base.range(of: "LoopFollow", options: .backwards) {
+            let suffix = base[range.upperBound...]
+            return "loopfollow\(suffix)"
+        }
+        return "loopfollow"
+    }
 
-        return "group.\(base)"
+    static func current() -> String {
+        "group.\(baseBundleID)"
     }
 
     private static func stripLikelyExtensionSuffixes(from bundleID: String) -> String {
diff --git a/LoopFollow/LiveActivity/LAAppGroupSettings.swift b/LoopFollow/LiveActivity/LAAppGroupSettings.swift
index 8fedeb155..b61487f27 100644
--- a/LoopFollow/LiveActivity/LAAppGroupSettings.swift
+++ b/LoopFollow/LiveActivity/LAAppGroupSettings.swift
@@ -135,6 +135,8 @@ enum LAAppGroupSettings {
         static let lowLineMgdl = "la.lowLine.mgdl"
         static let highLineMgdl = "la.highLine.mgdl"
         static let slots = "la.slots"
+        static let displayName = "la.displayName"
+        static let showDisplayName = "la.showDisplayName"
     }
 
     private static var defaults: UserDefaults? {
@@ -176,4 +178,19 @@ enum LAAppGroupSettings {
         }
         return raw.map { LiveActivitySlotOption(rawValue: $0) ?? .none }
     }
+
+    // MARK: - Display Name
+
+    static func setDisplayName(_ name: String, show: Bool) {
+        defaults?.set(name, forKey: Keys.displayName)
+        defaults?.set(show, forKey: Keys.showDisplayName)
+    }
+
+    static func displayName() -> String {
+        defaults?.string(forKey: Keys.displayName) ?? "LoopFollow"
+    }
+
+    static func showDisplayName() -> Bool {
+        defaults?.bool(forKey: Keys.showDisplayName) ?? false
+    }
 }
diff --git a/LoopFollow/LiveActivity/LiveActivityManager.swift b/LoopFollow/LiveActivity/LiveActivityManager.swift
index 9faa8a41e..bab2af0e1 100644
--- a/LoopFollow/LiveActivity/LiveActivityManager.swift
+++ b/LoopFollow/LiveActivity/LiveActivityManager.swift
@@ -310,6 +310,10 @@ final class LiveActivityManager {
                 lowMgdl: Storage.shared.lowLine.value,
                 highMgdl: Storage.shared.highLine.value,
             )
+            LAAppGroupSettings.setDisplayName(
+                Bundle.main.object(forInfoDictionaryKey: "CFBundleDisplayName") as? String ?? "LoopFollow",
+                show: Storage.shared.showDisplayName.value
+            )
             GlucoseSnapshotStore.shared.save(snapshot)
         }
         startIfNeeded()
@@ -557,6 +561,8 @@ final class LiveActivityManager {
 
     // MARK: - Renewal Notifications
 
+    private static let renewalNotificationID = "\(Bundle.main.bundleIdentifier ?? "loopfollow").la.renewal.failed"
+
     private func scheduleRenewalFailedNotification() {
         let content = UNMutableNotificationContent()
         content.title = "Live Activity Expiring"
@@ -564,7 +570,7 @@ final class LiveActivityManager {
         content.sound = .default
         let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1, repeats: false)
         let request = UNNotificationRequest(
-            identifier: "loopfollow.la.renewal.failed",
+            identifier: LiveActivityManager.renewalNotificationID,
             content: content,
             trigger: trigger,
         )
@@ -577,7 +583,7 @@ final class LiveActivityManager {
     }
 
     private func cancelRenewalFailedNotification() {
-        let id = "loopfollow.la.renewal.failed"
+        let id = LiveActivityManager.renewalNotificationID
         UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [id])
         UNUserNotificationCenter.current().removeDeliveredNotifications(withIdentifiers: [id])
     }
diff --git a/LoopFollow/LiveActivity/RestartLiveActivityIntent.swift b/LoopFollow/LiveActivity/RestartLiveActivityIntent.swift
index cb1f84d18..00740e10e 100644
--- a/LoopFollow/LiveActivity/RestartLiveActivityIntent.swift
+++ b/LoopFollow/LiveActivity/RestartLiveActivityIntent.swift
@@ -15,7 +15,7 @@ struct RestartLiveActivityIntent: AppIntent {
         let apnsKey = Storage.shared.lfApnsKey.value
 
         if keyId.isEmpty || apnsKey.isEmpty {
-            if let url = URL(string: "loopfollow://settings/live-activity") {
+            if let url = URL(string: "\(AppGroupID.urlScheme)://settings/live-activity") {
                 await MainActor.run { UIApplication.shared.open(url) }
             }
             return .result(dialog: "Please enter your APNs credentials in LoopFollow settings to use the Live Activity.")
diff --git a/LoopFollow/LiveActivity/StorageCurrentGlucoseStateProvider.swift b/LoopFollow/LiveActivity/StorageCurrentGlucoseStateProvider.swift
index 90e74f5b8..b1a416b97 100644
--- a/LoopFollow/LiveActivity/StorageCurrentGlucoseStateProvider.swift
+++ b/LoopFollow/LiveActivity/StorageCurrentGlucoseStateProvider.swift
@@ -1,5 +1,5 @@
+// LoopFollow
 // StorageCurrentGlucoseStateProvider.swift
-// 2026-03-21
 
 import Foundation
 
@@ -7,7 +7,6 @@ import Foundation
 /// This is the only file in the pipeline that is allowed to touch Storage.shared
 /// or Observable.shared — all other layers read exclusively from this provider.
 struct StorageCurrentGlucoseStateProvider: CurrentGlucoseStateProviding {
-
     // MARK: - Core Glucose
 
     var glucoseMgdl: Double? {
diff --git a/LoopFollow/Storage/Storage+Migrate.swift b/LoopFollow/Storage/Storage+Migrate.swift
index aa0868543..97cbb8b18 100644
--- a/LoopFollow/Storage/Storage+Migrate.swift
+++ b/LoopFollow/Storage/Storage+Migrate.swift
@@ -2,6 +2,7 @@
 // Storage+Migrate.swift
 
 import Foundation
+import UserNotifications
 
 extension Storage {
     func migrateStep5() {
@@ -32,6 +33,21 @@ extension Storage {
         }
     }
 
+    func migrateStep7() {
+        // Cancel notifications scheduled with old hardcoded identifiers.
+        // Replaced with bundle-ID-scoped identifiers for multi-instance support.
+        LogManager.shared.log(category: .general, message: "Running migrateStep7 — cancel legacy notification identifiers")
+
+        let legacyNotificationIDs = [
+            "loopfollow.background.alert.6min",
+            "loopfollow.background.alert.12min",
+            "loopfollow.background.alert.18min",
+            "loopfollow.la.renewal.failed",
+        ]
+        UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: legacyNotificationIDs)
+        UNUserNotificationCenter.current().removeDeliveredNotifications(withIdentifiers: legacyNotificationIDs)
+    }
+
     func migrateStep6() {
         // APNs credential separation
         LogManager.shared.log(category: .general, message: "Running migrateStep6 — APNs credential separation")
diff --git a/LoopFollow/ViewControllers/MainViewController.swift b/LoopFollow/ViewControllers/MainViewController.swift
index bbf2de63c..61925da91 100644
--- a/LoopFollow/ViewControllers/MainViewController.swift
+++ b/LoopFollow/ViewControllers/MainViewController.swift
@@ -178,6 +178,11 @@ class MainViewController: UIViewController, UITableViewDataSource, ChartViewDele
             Storage.shared.migrationStep.value = 6
         }
 
+        if Storage.shared.migrationStep.value < 7 {
+            Storage.shared.migrateStep7()
+            Storage.shared.migrationStep.value = 7
+        }
+
         // Synchronize info types to ensure arrays are the correct size
         synchronizeInfoTypes()
 
diff --git a/LoopFollowLAExtension/LoopFollowLiveActivity.swift b/LoopFollowLAExtension/LoopFollowLiveActivity.swift
index 5c28eed3b..1abbb6c81 100644
--- a/LoopFollowLAExtension/LoopFollowLiveActivity.swift
+++ b/LoopFollowLAExtension/LoopFollowLiveActivity.swift
@@ -9,21 +9,21 @@ import WidgetKit
 private func makeDynamicIsland(context: ActivityViewContext<GlucoseLiveActivityAttributes>) -> DynamicIsland {
     DynamicIsland {
         DynamicIslandExpandedRegion(.leading) {
-            Link(destination: URL(string: "loopfollow://la-tap")!) {
+            Link(destination: URL(string: "\(AppGroupID.urlScheme)://la-tap")!) {
                 DynamicIslandLeadingView(snapshot: context.state.snapshot)
                     .overlay(RenewalOverlayView(show: context.state.snapshot.showRenewalOverlay))
             }
             .id(context.state.seq)
         }
         DynamicIslandExpandedRegion(.trailing) {
-            Link(destination: URL(string: "loopfollow://la-tap")!) {
+            Link(destination: URL(string: "\(AppGroupID.urlScheme)://la-tap")!) {
                 DynamicIslandTrailingView(snapshot: context.state.snapshot)
                     .overlay(RenewalOverlayView(show: context.state.snapshot.showRenewalOverlay))
             }
             .id(context.state.seq)
         }
         DynamicIslandExpandedRegion(.bottom) {
-            Link(destination: URL(string: "loopfollow://la-tap")!) {
+            Link(destination: URL(string: "\(AppGroupID.urlScheme)://la-tap")!) {
                 DynamicIslandBottomView(snapshot: context.state.snapshot)
                     .overlay(RenewalOverlayView(show: context.state.snapshot.showRenewalOverlay, showText: true))
             }
@@ -51,7 +51,7 @@ struct LoopFollowLiveActivityWidget: Widget {
                 .activitySystemActionForegroundColor(.white)
                 .activityBackgroundTint(LAColors.backgroundTint(for: context.state.snapshot))
                 .applyActivityContentMarginsFixIfAvailable()
-                .widgetURL(URL(string: "loopfollow://la-tap")!)
+                .widgetURL(URL(string: "\(AppGroupID.urlScheme)://la-tap")!)
         } dynamicIsland: { context in
             makeDynamicIsland(context: context)
         }
@@ -106,7 +106,7 @@ private struct LockScreenFamilyAdaptiveView: View {
                 .activitySystemActionForegroundColor(.white)
                 .activityBackgroundTint(LAColors.backgroundTint(for: state.snapshot))
                 .applyActivityContentMarginsFixIfAvailable()
-                .widgetURL(URL(string: "loopfollow://la-tap")!)
+                .widgetURL(URL(string: "\(AppGroupID.urlScheme)://la-tap")!)
         }
     }
 }
@@ -206,8 +206,10 @@ private struct LockScreenLiveActivityView: View {
                 .frame(maxWidth: .infinity, alignment: .trailing)
             }
 
-            // Footer: last update time
-            Text("Last Update: \(LAFormat.updated(s))")
+            // Footer: last update time, optionally prefixed with display name
+            Text(LAAppGroupSettings.showDisplayName()
+                ? "\(LAAppGroupSettings.displayName()) — \(LAFormat.updated(s))"
+                : "Last Update: \(LAFormat.updated(s))")
                 .font(.system(size: 11, weight: .regular, design: .rounded))
                 .monospacedDigit()
                 .foregroundStyle(.white.opacity(0.65))