Perfect timing for every situation with the free Runtastic Workout & Interval Timer app – the practical, simple and easy-to-use interval timer app with voice feedback. The Runtastic Workout & Interval Timer app is more than a stopwatch or countdown clock. Whether it’s for your HIIT or tabata workouts, circuit training or at-home bodyweight training workouts, this app is for you. Set as many timers on your smartphone as you desire, save these settings, and use your customized timers again and again. Define your workout intervals (workout, rest periods, sets, reps) and construct unique, personalized workouts!