HIIT Timer
Customizable high-intensity interval training timer with presets for Tabata, classic HIIT, and endurance workouts. Audio cues and round tracking.
About HIIT Timer
Set your work and rest intervals, pick a round count, and let the timer run your workout while you focus entirely on moving. HIIT Timer comes loaded with presets for Tabata (20 seconds on, 10 off), classic HIIT, and longer endurance blocks — or you can dial in every number yourself. Audio cues call out each transition so you never need to glance at the screen mid-burpee.
Round tracking keeps a running count as you go, which matters more than it sounds when fatigue starts blurring the numbers in your head. It fits naturally into any health & fitness routine, whether you're building a home circuit or timing rest periods at the gym. If you want to pair effort with recovery, Breathing Exercise is a solid companion for winding down after a hard session.
The app works best on a phone propped at eye level — audio handles the coaching, so you won't need to touch the screen once the timer starts.
Look inside
How to use
This is a HIIT (High-Intensity Interval Training) workout timer that alternates between work and rest periods. • Select a preset workout (Tabata, Classic, etc.) or customize your own by setting work time, rest time, and number of rounds • Click "Start Workout" to begin with a 5-second preparation countdown • Follow the on-screen prompts: "WORK" periods for exercise, "REST" periods for recovery • Audio beeps signal phase changes: long beep for work periods, short beep for rest • The progress bar shows time remaining in current phase • Use "Pause/Resume" to temporarily stop the timer • Click "Stop" to end the workout early and return to setup • Timer displays current round, elapsed time, and total workout duration • Workout completes automatically after all rounds are finished The app runs entirely in your browser - just set your intervals and start exercising!
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