Stopwatch

A clean running clock with tenths, a lead-in countdown, and pause. Nothing else.

Get ready

0:10

Total: Open

Keep this tab open and your screen on. Browsers suspend background tabs, so the beeps stop if you switch away. The app keeps running with the screen locked.

Same timer, with the screen off

The app keeps the clock and the beeps going when your phone locks. Free on iOS and Android.

What to use it for

Timing an unstructured piece, a run, a hold, or a rest period between heavy sets. The tenths matter for anything short: a max plank hold or a 500 m row is decided in fractions of a second, and a whole-second clock hides your actual progress.

For rest between strength sets, the stopwatch is the difference between resting 3 minutes and resting however long the conversation lasted. Rest length is a training variable, and most people let it drift.

Sound and the screen lock

One limit worth knowing before you start: a browser tab cannot make sound once your phone locks or you switch apps, because browsers suspend background tabs to save battery. For a workout where the phone sits in your pocket or face down on the floor, use the app instead. It keeps the clock and the beeps running with the screen off.

FAQ

Does it show tenths of a second?

Yes, once the clock is running. The lead-in countdown shows whole seconds.

Can I pause and resume?

Yes. Pause holds the clock and resume continues from where it stopped, without losing the elapsed time.

Other timers

Need it to run with the screen locked?

Browsers suspend background tabs, so a web timer goes quiet the moment you switch apps. The Personal Records app keeps the clock and the beeps running with your phone in your pocket.

Free on iOS and Android. No account needed to start.