Pick your intervals
Start from Tabata, HIIT or Pomodoro, or use the steppers to set your own work, rest and rounds.
OneTime · Web toolWork. Rest.
Repeat.
A free interval timer for workouts and focus. Set work, rest and rounds, start the countdown, and hear a beep at every change.
FreeNo sign-inNo uploadBeeps
8 rounds · 3:50
WorkRound 1 of 8
Press start when you're ready.
Space start · S skip · R reset
Work
20s
Rest
10s
Rounds
8
How it works
Press start
The ring counts down each work and rest block, with a short beep marking every change. Pause or skip whenever you need.
Repeat or reset
Switch to the stopwatch for open-ended timing with laps, or reset the interval timer for a clean session.
Want your presets and history saved? OneTime on the App Store keeps them for the next session.
Questions
Is this interval timer free?
Yes. The web timer is free, needs no account and has no cap on the number of sessions. The OneTime iPhone app is also free on the App Store.
Does the timer beep at every interval?
Yes. A short tone plays when work becomes rest and when the next round begins, generated in your browser with no audio files to download. Use the Sound on/off button to mute it.
Will it keep running if I lock my phone or switch tabs?
No. Browsers throttle background tabs, so the countdown can fall behind or pause if the page is hidden. Keep this page visible while you time. The OneTime iPhone app is a native timer built for workouts, with beeps that play alongside your music.
Can I use it for Pomodoro?
Yes. Choose the Pomodoro preset for 25 minutes of work and a 5 minute break across four rounds, or adjust the steppers to any split you like.
Does it include a stopwatch?
Yes. The Stopwatch tab counts up with lap splits, and marks your fastest and slowest laps as you go.
Does it save my intervals if I reload the page?
No. Settings and laps live in the page while it is open, so a reload starts fresh. Nothing is stored on your device or sent to a server. The OneTime app saves presets and workout history.
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