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I am developing a project with the Screen Time API, and I cannot understand why the methods inside DeviceActivityMonitor extension are not being called. Some points to note: I do start by requesting authorization from the User (this is working as expected when opening the app) Both the DeviceActivityMonitor Extension and the main app are under the same App Group I have added Family Controls capability to both targets and have the developer account to use it. I start by calling center.startMonitoring() I have overridden the original methods. Yet, when startMonitoring is called, there is no action that is supposed to be taken that is being taken, and as far as I can tell, the methods aren't even being called. Here are some relevant snippets of code: // EXT class DeviceActivityMonitorExtension: DeviceActivityMonitor { override func intervalDidStart(for activity: DeviceActivityName) { super.intervalDidStart(for: activity) let store = ManagedSettingsStore(named: .daily) } override func intervalDidEnd(for activity: DeviceActivityName) { super.intervalDidEnd(for: activity) let store = ManagedSettingsStore(named: .daily) store.clearAllSettings() } override func eventDidReachThreshold(_ event: DeviceActivityEvent.Name, activity: DeviceActivityName) { super.eventDidReachThreshold(event, activity: activity) let store = ManagedSettingsStore(named: .daily) let model = BeeFreeModel.shared let applications = model.selectionToDiscourage.applicationTokens let categories = model.selectionToDiscourage.categoryTokens let webDomains = model.selectionToDiscourage.webDomainTokens store.shield.applications = applications.isEmpty ? nil : applications store.shield.applicationCategories = categories.isEmpty ? nil : ShieldSettings.ActivityCategoryPolicy.specific(categories) store.shield.webDomains = webDomains.isEmpty ? nil : webDomains } } // APP extension DeviceActivityName { static let daily = Self("daily") } extension DeviceActivityEvent.Name { static let discouraged = Self("discouraged") } let schedule = DeviceActivitySchedule( intervalStart: DateComponents(hour: 0, minute: 0, second: 0), intervalEnd: DateComponents(hour: 23, minute: 59, second: 59), repeats: true ) class BeeFreeSchedule { static public func setSchedule() { print("Setting schedule...") print("Hour is: ", Calendar.current.dateComponents([.hour, .minute], from: Date()).hour!) let events: [DeviceActivityEvent.Name: DeviceActivityEvent] = [ .discouraged: DeviceActivityEvent( applications: BeeFreeModel.shared.selectionToDiscourage.applicationTokens, categories: BeeFreeModel.shared.selectionToDiscourage.categoryTokens, webDomains: BeeFreeModel.shared.selectionToDiscourage.webDomainTokens, threshold: BeeFreeModel.shared.thresholdToDiscourage ) ] let center = DeviceActivityCenter() do { print("Try to start monitoring...") // Call startMonitoring with the activity name, schedule, and events try center.startMonitoring(.daily, during: schedule, events: events) } catch { print("Error monitoring schedule: ", error) } } } // APP class BeeFreeModel: ObservableObject { // Import ManagedSettings to get access to the application shield restriction let store = ManagedSettingsStore() //@EnvironmentObject var store: ManagedSettingsStore @Published var selectionToDiscourage: FamilyActivitySelection @Published var thresholdToDiscourage: DateComponents @Published var setOfApps: [String] init() { selectionToDiscourage = FamilyActivitySelection() thresholdToDiscourage = DateComponents() var setOfAppIdentifiers: Set<String?> = Set<String?>() setOfApps = [String]() if selectionToDiscourage.applicationTokens.isEmpty {} else { for application in BeeFreeModel.shared.selectionToDiscourage.applications { setOfAppIdentifiers.insert(application.localizedDisplayName) setOfApps = setOfAppIdentifiers.compactMap { $0 }.sorted() } } } class var shared: BeeFreeModel { return _BeeFreeModel } func setSelection() { let applications = BeeFreeModel.shared.selectionToDiscourage } func changeThreshold(threshold: DateComponents) { thresholdToDiscourage = threshold } } // APP /// ... Button("Select Apps to Discourage") { isDiscouragedPresented = true } .familyActivityPicker(isPresented: $isDiscouragedPresented, selection: $model.selectionToDiscourage) } .onChange(of: model.selectionToDiscourage) { BeeFreeModel.shared.setSelection() } // ... // ... Button("Save Time") { saveTime() let new_threshold = DateComponents(hour: savedTime?.hours, minute: savedTime?.minutes, second: savedTime?.seconds) model.changeThreshold(threshold: new_threshold) } } .onChange(of: model.thresholdToDiscourage) { BeeFreeSchedule.setSchedule() // ... I believe I am using the latest stable version of Xcode (recently deleted and reinstalled). I'm really new to mobile development to Swift so any help is greatly appreciated. Thank you! :)