Seconds Pro Interval Timer is the best interval timer for Tabata, HIIT & Circuit Training workouts. As well as being featured by Apple, it is recommended by celebrity and personal trainers to their clients all around the globe. INTERVAL TIMER: - Full screen, colored display. Easy to read from a distance. Landscape or portrait. - Templates for HIIT, Tabata & Circuit Training. Combine timers for ultimate control. - Speaks your interval names & can provide warning for upcoming intervals. - Other alerts including beeps and bells are available. - Assign music per interval or per interval timer. - Match the intensity of your music to the intensity of your HIIT workoutk. - Interval timer runs in the background while you use other apps. - Share your interval timer with a friend. ADDITIONAL TIMERS: - Stopwatch highlights best and worst lap times. - Countdown Timer with 5 preset durations (only first 3 on Apple Watch). APPLE HEALTH: - Seconds Pro Interval Timer can use Apple Health to save workouts or mindful sessions, read body measurements and year of birth to calculate calorie expenditure in conjunction with a heart rate monitor. VARIANTS: - Please note, Seconds Interval Timer and Seconds Pro Interval Timer are separate products. Once paid for they each contain identical features. However, they are not interchangeable. If you have purchased one you should always download that version and in the case of Seconds Interval Timer, restore the in-app purchase within it gain access to the upgraded features.