Stopwatch & Timer
A precise stopwatch with laps, plus a countdown timer with an audible finish.
How to use
Stopwatch: Start, Lap to record split times, Reset to clear. Timer: set minutes/seconds and start — it beeps when time is up. Keep this tab open while either runs.
Yes, as long as the tab stays open and the device is not muted. Browsers can throttle background tabs, so keep this page visible for precise timing.