Dynamic StopWatch 188.8.131.52
Made for fitness but it can be used for any other type of activity.
You set the duration time you desire, the pause time and the number of repetitions.
The stopwacth will control your training with voice notifications telling you when to rest and resume training.
Excellent for abs or running training.
Requirements: Windows Phone 8.1, Windows Phone 8, Windows Phone 7.5