An interval timer built for CrossFit
AMRAP, EMOM, TABATA and FOR TIME, with a boxing bell for every segment. Cues play even in silent mode, and the timer pauses when you leave the screen, so you never lose your progress.
Four workout formats
Each format shows only the settings it needs, and common setups are one tap away.
FOR TIME
Fixed work, as fast as you can
Counts up from 00:00. Tap “Done” when you finish and that time is your score. You can set a time cap.
AMRAP
Fixed time, as much as you can
Counts down a fixed time. Get as many rounds or reps as possible before it ends.
EMOM
A new round every interval
Do the set reps at the start of each interval. Whatever time is left is your rest.
TABATA
Work and rest alternate
Defaults to the classic 20 seconds of work and 10 seconds of rest × 8 rounds, switching and cueing for you.
Made for the gym floor
- Bells play even in silent mode. Your music keeps playing and is only lowered briefly for each cue.
- The screen stays on during the countdown and the workout. Before you start, it checks media volume, power saving and battery and warns you about anything that could get in the way.
- Switching apps or locking the screen pauses the timer. If the app is closed, crashes or the phone shuts down, it reopens at the last pause point. Tap “Resume” to carry on.
- Combine your result with a photo, or copy the result as text to share.
- Available in 繁體中文, 简体中文 and English, switchable inside the app.
No network, no data collection
No account, ads or tracking. Settings and workout progress stay on your phone. Photos are combined on your phone and only leave the app when you tap “Save” or “Share”.
Rather not install?
BOX CLOCK also has a web version with the same timing rules. Just open it in your browser.