Focused work block
- Input
- 1:00:00
- Expected output
- 00:00:00
A 1 hour block is common in time-management techniques like time blocking, longer than the 25 minutes of a single Pomodoro cycle.
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1 hour timer
Over a full hour, a timer that adds up second by second has far more time to accumulate error than a 5 minute one. This is exactly the scenario where anchoring the clock to an absolute timestamp (instead of incremental counting) makes a real difference.
A 1 hour block is common in time-management techniques like time blocking, longer than the 25 minutes of a single Pomodoro cycle.
Long, low-temperature roasts often call for 1 hour or more, the alarm still works with the browser minimized while you do something else.
Yes. Instead of adding up seconds on every tick, the timer stores the exact millisecond instant the countdown should end and recomputes the remaining time from the real clock whenever the page runs again. Switching tabs, minimizing the window, or the browser throttling setInterval to save battery never throws off the final result.
As long as the browser keeps running in the background (without the whole operating system suspending), the calculation stays exact because it is recomputed from the real instant as soon as the tab runs again. Turn on the keep-screen-awake option if you want to stop the system itself from suspending during the countdown.
Yes, in "sequence" mode you can build steps with different durations that automatically move from one to the next, including a 1 hour step followed by any other duration.
Loading saved timers...
Everything runs in your browser: the timers, the alarm audio and the countdown never touch a server. The list is saved locally (localStorage) on this device only.