When timer finishes, automatically restart the same interval until you stop it.

Stop automatically after this many completed intervals. Set to 0 for unlimited.

Pulse the phone when an interval ends. Requires browser vibration support.

Play an alert sound. Choose a built-in tone or upload your own.

Adjust the alert sound level.

How many times to repeat the alert sound when the timer fires.

Show a system notification when an interval finishes (works when tab is in background).

Prevent your phone from sleeping while the timer is running.

Display hundredths of a second for finer precision.

v1.0 · Self-contained PWA · Install via your browser menu (“Add to Home screen”) for the full app experience offline.