The app is for creating or using an existing workout for high intensity interval training.
Ranked in these QuestionsQuestion Ranking
Pro Supplies audio cues that help along without breaking up the flow
It gives 3 second warning beeps and vibrates right at the switching point.
Pro Can play music from library and allows creating a playlist
Pro It's free
Pro Has existing workouts that can be used
It includes a selection of both strength and cardio workouts.