How to use it
Use this focused timer for cooking, study blocks, meetings, exercises, or other in-tab duration tracking.
- Set hours, minutes, and seconds; the total must be greater than zero.
- Start the countdown, then pause or resume without losing elapsed time.
- Reset to edit the duration or restart after it reaches zero.
Worked example
- Output
04:59 after one second of active running
Paused time is excluded because elapsed time is measured only during running intervals.
Method and definitions
- Remaining time equals the chosen duration minus accumulated monotonic elapsed milliseconds.
- The display is derived from elapsed time on every update instead of decrementing a counter by assumption.
Limits and edge cases
- Maximum duration is 99:59:59; the tool does not request notifications, sound, or background execution.
- Browsers can throttle or suspend inactive tabs, but the next update recalculates against elapsed monotonic time.
Privacy
Entries, dates, times, and results remain in this tab. Rigula does not upload them or add them to the URL.
Sources
