Timer
Set a duration and count down to zero. Pause keeps the remaining time; reset returns to the chosen duration.
Example: set five minutes to tidy one part of your desk, then review what remains.
How to use moment.
Practical examples for timers, stopwatch laps and D-Day dates, with focus routines, local storage, offline use and alarm limits.
Three ways to keep time
Stopwatch
Start at zero to measure an activity whose length you do not know. Laps mark separate stages within the same measurement.
Example: rehearse a talk and mark a lap after each section. Pause before saving the measurement.
D-Day
Save a name and date to compare calendar days in your device’s local time zone. This is a day count, not an exact-hour alarm.
Example: a trip tomorrow shows D-1. Today is D-Day; yesterday is D+1.
A short first-use check
- Confirm the mode, duration and sound setting before starting. A preset page does not replace a countdown that is already running.
- Try a short countdown with the page visible. Sound, vibration and keeping the screen awake depend on the device and browser.
- After stopping, save or export anything you need. Private browsing or clearing site data can remove local records.
A timer for everyday things
Choose a preset or enter hours, minutes, and seconds under Custom time. Start your countdown when you are ready. Pause for a break, then resume from the same point. Reset returns to your chosen duration. Try five minutes for stretching or ten minutes for tidying. Remaining time comes from the finish timestamp, so returning to this tab updates the display instead of losing elapsed seconds. Changing your device clock changes the countdown. Reloading restores an active timer on this device when storage is available.
Repeating focus and interval routines
Open Focus cycle to repeat focus and breaks automatically. Set the durations and session count; every fourth focus session is followed by a long break. Completed focus and time stopped early are shown separately in Records. Intervals offers preparation, work, rest and sets. Save a named routine to reuse it. Pause the stopwatch to save a named measurement with laps and export it as CSV. All saved data stays in this browser; devices do not sync.
Before relying on an alert
Not reliably. Browsers can suspend pages when a device sleeps. Keep the page visible and sound enabled. Screen wake lock is a best-effort option on supported devices. Do not use this as a safety-critical alarm.
How are D-Day dates counted?
D-Day compares calendar dates in your device's local time zone. Tomorrow is D-1, today is D-Day, yesterday is D+1. A calendar day counts as one even across daylight saving changes. Events do not sync between devices.
Keep your dates safe
Save a JSON backup before clearing browser data or moving devices. Restore merges valid events and skips matching names and dates. Undo restores the most recent deletion; it is available until you reload or leave this page.
Install app
Open the app online once and wait for installation to finish before trying offline. Install from your browser menu, or Share → Add to Home Screen on iPhone. Reopening uses your selected language. Keep the page visible for alarms; a locked or sleeping phone may delay or silence them. Timer, stopwatch and laps restore on reload when browser storage is available. Clearing site data removes them.
What stays in this browser
Settings, saved timers, dates and records stay in this browser. They do not sync to other devices. Keep a D-Day JSON backup before clearing site data; only D-Day dates can be restored from that file. Record CSV files are exports for reading, not restore files. Focus history keeps the latest 1,000 sessions; saved stopwatch measurements are limited to 100.