Interval timer
Runs in your browser. Nothing you type is sent anywhere.
Get ready
Get ready: 10 seconds left.
Times like 20, 0:45, or 1m. A plain number is seconds.
How to use the interval timer
- Set the work and rest times, the number of rounds, and how many sets.
- Press Start, or the space bar. You get a short countdown to get ready.
- Three beeps count you in to each round. A low beep means rest.
- Turn on Voice to hear "Work" and "Rest" as well.
Questions
How do I type the times?
A plain number is seconds, so 45 means 45 seconds. You can also type 1:30, 90s, or 2m. Set Rest to 0 for rounds back to back, and Get ready to 0 to start straight away.
What's the difference between rounds and sets?
A round is one work interval and the rest after it. A set is a group of rounds. With 8 rounds and 3 sets, you do 8 rounds, take the longer rest between sets, and repeat three times.
Can I hear it without looking at the screen?
Yes. Three short beeps count down the last seconds before each work interval, a long beep starts it, and a low beep starts each rest. Turn on Voice to hear the name of each part, spoken by your device.
Does it stay in time if I switch apps?
The beeps are scheduled ahead of time and the timer works out where you are from your device's clock, so it stays right in a background tab. On iPhone and iPad, keep this tab open, because Safari pauses hidden tabs.
What keyboard shortcuts are there?
Space starts and pauses, N skips to the next part, R resets, F goes full screen, and M turns the beeps on or off.
Is anything sent to a server?
No. The timer runs in your browser and your workout is remembered on this device only.
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