Frequently Asked Questions
TimerKit is a free online timer toolkit — no ads, no account, works offline. Here's what people ask most.
Is TimerKit free to use?
Yes — TimerKit is free, with no ads, no subscription, and no account required. Every timer, stopwatch, and mode is available to anyone who visits the site.
Do the timers keep running when I switch tabs or lock my phone?
Yes. TimerKit stores an absolute end time (the exact clock time the timer will reach zero) rather than counting down tick by tick. When you come back to the tab, it calculates how much time has passed and displays the correct remaining time. Background throttling by the browser does not affect accuracy.
Does TimerKit work offline?
Yes. TimerKit is a Progressive Web App (PWA). After your first visit, the site caches itself and runs without an internet connection. You can also install it to your home screen from any modern browser — no app store required.
How do I install TimerKit on my phone?
On iPhone (Safari): tap the Share button, then 'Add to Home Screen'. On Android (Chrome): tap the three-dot menu, then 'Add to Home Screen' or 'Install App'. Once installed, it opens full-screen with no browser chrome.
What timer styles are available?
TimerKit includes multiple visual styles: Digital, Modern, Chronograph, iOS, Flip Clock, Sand Timer, Candlestick, Dot Matrix, Roadsign, Scoreboard, Nokia LCD, LCD HD, Retro LCD, Arcade Classic, Digital 7, Kids Timer, and Drum Counter. Each style can be used with any duration.
Can I set a custom timer duration?
Yes. Type any duration into the input on the homepage — formats like '5m', '1h30m', '90s', or '2h15m30s' all work. You can also navigate directly to URLs like /timer/modern?d=1h30m.
What is a Pomodoro timer and how does it work here?
The Pomodoro Technique breaks work into 25-minute intervals followed by 5-minute breaks. After four intervals, you take a longer 15–30 minute break. TimerKit's Pomodoro timer handles the interval switching automatically and plays an audio alert between phases.
What is Tabata timing?
Tabata is an interval protocol: 20 seconds of high-intensity effort followed by 10 seconds of rest, repeated for 8 rounds (4 minutes total per set). TimerKit's Tabata timer counts the rounds and switches phases automatically.
Does the alarm sound play on silent mode on iPhone?
No. TimerKit uses the Web Audio API, which respects iOS silent mode. If your phone is on silent, no sound will play. Use the notification option or keep your volume on if you need an audible alert.
How do I use the stopwatch lap feature?
Start the stopwatch, then press the Lap button each time you want to mark a split. Each lap time and cumulative time are recorded in a list below the display. The stopwatch keeps running while you record laps.
What keyboard shortcuts does TimerKit support?
On the timer pages: Space bar starts and pauses, R resets the timer. On the stopwatch: Space starts and stops, L records a lap. Shortcuts work on desktop browsers; mobile uses the on-screen controls.
Does TimerKit store any personal data?
No. TimerKit does not require an account and does not collect personal data. Theme preference (light/dark) is stored in your browser's localStorage only. No data leaves your device.
Can I use TimerKit in a classroom or meeting room?
Yes. Open any timer on a laptop or tablet, go full-screen with F11 (or the browser's full-screen option), and it's visible across a room. The Kids Timer and Chronograph styles work well for classroom use.
What browsers does TimerKit support?
Any modern browser: Chrome, Firefox, Safari, and Edge. The Web Audio API and PWA features require a recent version (2021 or newer). Internet Explorer is not supported.
Ready to start? Pick a timer on the homepage, or jump straight to the modern countdown timer.