watchOS Application Fundamentals

Parent Application

Watch apps can communicate with their parent app running on iOS.

App Groups

Sharing settings and data between iOS and Watch apps.


How to add icons to Apple Watch apps.


Design tips for building Apple Watch user interfaces.


A guide to translating your Apple Watch app content to support multiple languages.

Learn about the two navigation options available for watch apps: hierarchical or page-based navigation.

Screen Sizes

Preview and optimize your user interface for both available watch sizes.


Add a settings screen for your watch app.