PocketPlay
中文

Countdown & Stopwatch

A countdown timer with presets and an alarm, plus a stopwatch with lap times and a full-screen big-digit display.

🔒 Runs in your browser — files never leave your deviceFree · No sign-up
00:00

Tap a number for that many minutes, or set hours, minutes and seconds below.

How to use the timer

  1. On the countdown tab tap a preset or type hours, minutes and seconds — you can also give a clock time and it will count down to that moment today.
  2. Press Start; the remaining time also appears in the tab title, and an alarm sounds when it reaches zero.
  3. Switch to the stopwatch for lap timing, and press Full screen to turn either one into a room-sized display.

FAQ

Will it still be right if I switch tabs?

Yes. Both timers work from timestamps rather than counting ticks, so a browser that throttles background tabs cannot make them drift, and they resync the moment the page becomes visible again.

Does the alarm work with the sound off?

The alarm is generated with the Web Audio API, so it follows your device volume and needs the page to have been interacted with at least once — pressing Start is enough. If your phone is on silent you will get the flashing display but no sound.

What is the difference between lap time and total?

Lap time is how long that single lap took; total is the elapsed time from the start to the moment you pressed lap. Coaches usually read laps, runners usually read totals.

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