Run a stopwatch with lap splits and a countdown with an optional chime — all timing happens in your tab, like APK Analyzer and APK String Extractor: nothing is uploaded to DroidXP. Use Space outside inputs to start or pause (stopwatch or countdown). Copy laps as TSV for spreadsheets.
Lap table — Split is this lap; Total is elapsed.
| Lap | Split | Total |
|---|---|---|
| No laps yet — start the stopwatch and tap Lap. | ||
Quick presets
Timers and laps never leave your browser — the same local-only model as
APK String Extractor. Optional settings (sound, default countdown, last tab) may be stored in
localStorage on your device only.
Display updates follow requestAnimationFrame while running. Background tabs may throttle JavaScript; for best precision, keep this page visible. This is not a certified chronometer.
Use Stopwatch for open-ended timing and lap splits. Use Countdown for fixed durations (focus blocks, cooking timers). For Pomodoro-style work/break cycles, see the Pomodoro Timer when it is available on DroidXP.
No. The stopwatch and countdown run only in your browser — the same local-only stance as APK Analyzer and APK String Extractor. Optional settings can be saved in localStorage on your device only.
Browsers throttle timers in background tabs to save battery. This tool uses elapsed wall time when you return, but splits taken while backgrounded may be less precise — keep the tab visible for critical timing.
Display updates target ~10–50 ms; JavaScript and the event loop are not real-time. For scientific or legal timing, use dedicated hardware.
The optional chime uses Web Audio in-page — no microphone permission. Some browsers still require a user gesture before audio; starting the timer counts as that gesture.
This page is a general stopwatch plus arbitrary countdown. Pomodoro focuses on fixed work/break intervals — use whichever matches your workflow.
Running timers reset unless we add persistence mid-run (we do not). Saved preferences like sound on/off and default countdown values may restore from localStorage.
After the page loads once, core timing works offline in most browsers because logic is client-side — same offline-friendly idea as parsing APKs locally.
Yes — use Copy laps to place plain text on the clipboard for spreadsheets or notes.
Practically many hours — inputs are clamped to reasonable bounds so accidental huge values do not freeze the UI.
The display updates in place; reduce motion OS settings do not stop the timer but you can rely on numeric readouts instead of animation.