Make time for your next round.
Set your work time, rest time and number of rounds, then tap Start timer. The large display changes between WORK and REST, with a sound at each transition. The last work interval ends the routine, without an extra rest.
Two quick starting points
Tabata sets 20 seconds of work and 10 seconds of rest for 8 rounds. Boxing sets 3 minutes of work and 1 minute of rest for 3 rounds. Adjust either routine to suit you. Times in the settings are in seconds.
Keep the timer visible
This is a foreground timer. Switching tabs or apps, locking the phone, or opening help pauses the routine. Return and tap Resume when ready. Where supported, the screen stays awake while the timer runs. Browser and phone settings can still interrupt it; this is not a background alarm.
Your settings stay here
Your routine and sound preference are saved in this browser when storage is available. The timer never starts automatically when you return. Sound needs a working speaker and a suitable device volume; you can also use the visual timer with Sound turned off.
More tools: Metronome & tap tempo · Tally counter