How this timer works
The large digits count down the current phase. The strip above them shows the phase, round and time left in the session. Choose a preset, then adjust the fields if needed: work can be 1 to 3,600 seconds, rest can be 0 to 3,600 seconds, and you can run 1 to 99 rounds. A rest of zero means work rounds follow one another without a separate rest phase. Choose whether to include the 10-second lead-in before starting.
Press Start to begin, Pause to stop the countdown temporarily and Resume to continue. The timer builds the sequence when you start: the optional lead-in, followed by work rounds with rest between them. It finishes at the end of the last work round, with no final rest. Session left includes the lead-in. Reset stops the session and returns to Ready with the current settings. To change the work, rest, rounds or lead-in, reset the session and start again. The audio cue checkbox works during a session too.
The timer measures elapsed time with the device clock on every update, so it keeps correct time when the browser pauses updates in a background tab or on a sleeping device: when updates resume, it catches up and may pass several phases at once. Changing the device clock during a session shifts the countdown. Check that you can hear the cues before you rely on them. This is a timer, not a coach; rounds follow the schedule, not the work you actually complete.
Frequently asked questions
How do the Tabata and EMOM presets differ?
Tabata loads 20 seconds of work, 10 seconds of rest and eight rounds. This timer leaves out the final rest, so the rounds take 3 minutes 50 seconds. With the 10-second lead-in enabled, the total is 4 minutes. EMOM means every minute on the minute. Its preset has ten 60-second rounds and no separate rest phase: finish your work within the minute, then rest until the next round. Custom starts at 45 seconds of work, 15 seconds of rest and six rounds. You can edit the fields after choosing any preset.
What happens if I switch tabs or my device sleeps?
The time stays correct. The timer reads the device clock, so when the browser next updates the page it jumps to the right point, passing through several phases at once if it has to. The cues are what you lose: in a background tab or on a sleeping device, tones can arrive late or not at all, so keep the page visible and the device awake if you are following them.
Can I put it on a projector or a TV?
Yes. On a connected display, press Fullscreen to show the countdown alone, at a size meant to be read from the back of a room. The phase, round count and controls stay on the page, outside the fullscreen view. Press Escape or tap the countdown to return. If the browser lacks fullscreen support, the button is hidden, and if it refuses the request, the timer keeps running in its normal view.
Does it beep, and can I turn that off?
Yes. With Audio cue at each change checked, it plays a short tone at the start, on resume and at every phase change, pitched differently for work, rest and finish so you can tell which change happened without looking. To run silently, uncheck it. You can switch it on or off during a session; the change applies from the next tone. Browser sound permissions and device volume still apply. If you cannot hear a cue, return to normal view and check the phase readout. There are no flashing cues at transitions; flashing can be a problem for photosensitive viewers.
Is anything uploaded or stored?
No. The timer runs in this tab and does not upload your settings or session data. There is no account, and settings are not saved between visits. Reloading resets the session, and closing the tab ends it.
