See what’s new in Core Motion. Learn how your application can take advantage of the motion sensors on iOS devices. Walk through new features of the pedometer and learn how to use the altimeter to take your app to the next level. Get personal with motion APIs and sensor data on the Apple Watch. Run through a demo that uses motion-context awareness to make an application feel smarter!
MusicMotion: Adding Motion Awareness to a Music App
WWDC 2015 > System Frameworks > What’s New in Core Motion