Build a session with a number of rounds, work time, rest time, and optional preparation. The starting pattern is eight 20-second work intervals with 10 seconds between them: 3 minutes 50 seconds when the final rest is off, or four minutes when it is included.
The countdown names the current work or recovery phase while the progress bar shows the rounds. Pause to take more time, turn on sound or countdown cues if useful, and use fullscreen for a larger display. Changing a setting resets the current session; settings remain in this browser.