Intervals is minimal, yet highly versatile! FREE FEATURES - Tune work/rest for interval-based workouts like HIIT and Tabata. - Omit work time for rep-based workouts. - Customize number of sets. - Add optional warm-up or cool-down periods for graceful start/end. - Keep timer going in the background. PREMIUM FEATURES - Organize multiple workouts. - Create workouts with multiple exercises. - Add timer sounds. - Change app theme colors. - Customize seconds before start. - Auto-suspend timer after each exercise. - Rename workouts and exercises. - Clone an existing workout or exercise.