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Interval Timer
Build your own interval workout: named timers with sub-timers, minutes and seconds, repeats, end countdowns and 20 finish sounds. Start from 11 sample workouts (isometric holds, Bullworker, dead hang, plank, wall sit and more), see every round and rep as it runs, and save your series as a file on your device.
Not saved to a file yet
Total
27:40
Timers (3)
5:00 · 10 s countdown
LengthminsRepeat×2 sub-timers · 1:40 × 10 = 16:40 · repeats 10×
LengthSet by its sub-timers: 1:40 per round.
Repeat the whole block×0:40 · 10 s countdown
LengthminsRepeat×1:00 · 10 s countdown
LengthminsRepeat×
6:00 · 5 s countdown
LengthminsRepeat×
How to use it
Build your own interval workout: named timers with sub-timers, minutes and seconds, repeats, end countdowns and 20 finish sounds. Start from 11 sample workouts (isometric holds, Bullworker, dead hang, plank, wall sit and more), see every round and rep as it runs, and save your series as a file on your device.
- 1Pick one of the Samples or press New. Give your series a title and description, and pick a default finish sound (press ▶ to hear it).
- 2Add timers and name them. Set each one's minutes and seconds, a countdown at the end (Off, 3, 5, 10 seconds or custom), how many times it repeats, and its own finish sound if you like.
- 3Press + Sub-timer to turn a timer into a block, for example Hold 40 s and Rest 1 min repeated 10 times. Use the arrows to reorder and Duplicate to copy a timer; the total time updates as you go.
- 4Press Start. The big clock shows the current timer, the block it belongs to and how many rounds and reps are done, with progress bars and dots. Use Pause, Prev, Skip and Stop, or the Space bar.
- 5Use Save as… to keep the series as a .gnouptimer file on your device (you choose the name), Save to update it, and Open… to load it again later. Plain .json series files open too.
This is a general fitness timer, not medical advice. Warm up, use good form, and stop if you feel pain, dizziness or unwell; ask a doctor or physiotherapist before starting a new strength or tendon program. The sample workouts are timing templates only.
Everything runs in your browser. Your files are saved only where you choose on your own device and are never uploaded. The last series you edited and your sound settings are kept in this browser's local storage (gnoup-interval-timer-v1) so they are there next time. All 20 sounds are made live in your browser; phones on silent may mute them, and the screen is kept on while a timer runs where the browser allows it.