What is the primary interface for changing settings on an Apple Watch?

The primary interface for changing settings on an Apple Watch is the Settings app on the Apple Watch itself. This app allows users to access and adjust various device settings directly from the watch's interface. With the Settings app, users can manage options such as connectivity, notifications, activity settings, display preferences, and more.

While the Apple Watch app on paired iPhones does provide options for configuring some settings and sync preferences, it primarily serves as a companion app to manage the watch's features rather than as the primary interface for direct changes. The Control Center offers quick access to commonly used settings but is designed for temporary adjustments rather than comprehensive configuration. The notifications menu is meant for managing alerts and notifications rather than adjusting overall device settings.