Tabata Pro Workout Timer is all you need for interval training on your Apple TV.
Simple to use -- customize how long your work length is, your rest length, and how many rounds you're going to do, and press Go! We use voice cues that play over any music you have playing in the background so you know just when to stop and rest and when to get moving.
* Customize the number of rounds you will work
* Customize the length of each work session
* Customize the length of each rest
* Voice cues that count '3...2...1...Go!' and also '3...2...1...Rest'
* Colorful backgrounds change according to work vs rest time