Comment by wiremine

Am I groking this right? The Watchkit app actually runs on the iPhone as an extension, and just the UI component runs on the watch hardware?

Edit: better direct link: https://developer.apple.com/library/prerelease/ios/documenta...

"The Watch app resides on the user’s Apple Watch and contains only storyboard and resource files; it does not contain any code. The WatchKit extension resides on the user’s iPhone (inside your containing iOS app) and contains the code and resource files for managing your Watch app’s interface."