This chapter introduced you to Apple Watch apps and WatchKit extensions. Now you have a better understanding of what kinds of apps we can make for the watch. In the rest of this book we’ll go from an idea to a fully featured watch app. In the next chapter, though, we’ll talk about some things you can do in your iPhone app today to work with Apple Watch, even if you don’t have your own watch app yet.
For more information on Handoff, read the Handoff Programming Guide at https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/Handoff. For more information about Continuity, the iOS and OS X feature set that includes Handoff, read Apple’s site at http://www.apple.com/ios/whats-new/continuity/.