watchOS Apps Skill Design before you code — watchOS requires more planning than coding. Keep interactions brief: a few taps, then wrist down. Architecture | Layer | Technology | Purpose | |-------|-----------|---------| | Main app | SwiftUI + WatchKit | Navigation, direct interaction | | Complications | WidgetKit | Watch face data + app launch | | Smart Stack | WidgetKit | Swipe-up widget feed | | Notifications | UserNotifications | Alerts + actions | | Voice | App Intents / SiriKit | Siri + Shortcuts | | Health | HealthKit | Sensors, workouts | | Background | WKExtensionDelegate | Refresh, n…