The new operating system for Apple Watch, watchOS 2, was introduced a couple of weeks ago at WWDC 2015. It brings a lot of improvements, mostly for developers looking to create an Apple Watch app. Animations on watchOS 2 present an exciting and new opportunity for Apple Watch developers. In this tutorial, you will learn everything you need to know about native animations on watchOS 2.
Source files for the Tuts+ tutorial: watchOS 2: The Power of Animations
Read this tutorial on Tuts+