Interval or cycle training is a great way to push yourself and get in better shape faster. Choose the length of time for your interval exercise, a rest time and the number of cycles. The big iPad displays a countdown for each period in big bold modern type. The last 3 seconds of each period are enhanced with a beep so you know you're almost done without looking. Give it a try. Get fit today! Works on all iPads, but not on the iPad mini, sorry.