CrossFit Clock Open the clock

The clock that coaches.

A free interval timer for Tabata, EMOM, AMRAP and CrossFit sessions. It shouts the workout at you — "Work", your exercises by name, the time as it passes — and the whole screen changes colour with the phase, so you can read it from across the gym. Not that you'll have to.

Start a workout Add it to your phone

Free · no account · works offline

It calls your exercises by name

Type "Wall balls" into an interval and the clock says wall balls when it starts — and on the rest before it, "Rest. Next up is wall balls." Not a beep you have to interpret, and not a screen you have to find: the workout you wrote runs itself, and everyone hears what's coming while their hands are still on the bar.

Numbers you can hear

On long intervals it calls the time itself — "thirty… one minute… one thirty" on the way up, "ten… five" on the way down. Ten people sharing a three minute plank, each with their own goal, none of them able to look at a screen.

It plays over your music

Beeps and announcements mix with whatever you've got on — Spotify, YouTube, the gym's own speaker — instead of pausing it or ducking it to a whisper between every round. Put the phone on a Bluetooth speaker and the whole class hears the same clock.

Share with a code, sync with a handle

Share a workout and it gets a four-character code anyone can type into their own clock, account or not. Claim a handle and your own workouts follow you between devices: build on the laptop, run on the phone. No email, no password, and none of it is needed to use the timer.

Colour is the signal

Red is work, teal is rest, amber is get-ready, green is done. A dark fill drains down the screen as the interval runs, and the last two seconds flash in time with the beeps. You can call it from the far end of the gym without reading a number.

Tabata, EMOM, AMRAP — or whatever you call yours

A workout is blocks of sets of intervals, so most gym formats are just numbers you type in. These come as presets; the rest takes about a minute to build.

Tabata
8 rounds of 20 seconds work, 10 seconds rest. Four minutes, and it reads 4:00.
EMOM
Every minute on the minute — one interval, as many rounds as you've got in you.
AMRAP
One long interval and the rep scheme in the description. The clock just holds the window.
Circuits
A named exercise per station, called out as you rotate. Rest after the set.
Warm-up to finisher
Separate blocks in one session, so the whole class runs off one clock.
Holds and planks
Long intervals where the spoken count-up is the only thing you need.

Add it to your phone. It works offline.

Installed, it opens full-screen like an app, and every preset runs with no network at all. A session that gets interrupted picks up where the clock actually is, not where it was when the screen went dark.

iPhone / iPad

  1. Open the clock in Safari.
  2. Tap the Share button.
  3. Choose Add to Home Screen.

One thing worth knowing: iOS mutes web audio while the phone is on silent — the ringer switch, or Silent Mode in Control Center on newer iPhones. Take it off silent and the beeps come back.

Android

  1. Open the clock in Chrome.
  2. Open the ⋮ menu.
  3. Choose Install app.

Chrome usually offers to install it on its own after the first visit.

Pick one, hit start.

Tabata and a few other presets are already in there. Build your own when you want to. The clock does the talking.

Open the clock