How the timer runs a workout
A workout starts with the warm up, if you set one, and then alternates work and rest for the number of rounds you chose. That block is one set. With more than one set, the rest between sets comes after the last round of each set, and the cool down closes the session. The last rest of a set is skipped, because a set break or the end follows anyway. The coloured bar under the clock shows every part of the workout in order, with a marker for where you are.
Red means work, green means rest, blue means warm up or cool down. Above the time you see the current part, below it the round and set, what comes next and how long the whole session still lasts.
Beeps you can trust with your eyes closed
Three short beeps count down the last three seconds of every part longer than three seconds. A rising tone starts work, a falling tone starts rest, and a short melody ends the workout. The beeps are scheduled in advance on your device's audio clock, so they stay on the second even when you switch to a music app or the browser slows down background tabs.
Spoken cues read out the name of each part, such as Work or Rest, with your browser's built in voice. They are convenient, but browsers may delay speech in a background tab, so keep the page visible when you rely on them.
Formats it covers
HIIT with fixed work and rest, such as 40 seconds on and 20 off. EMOM, every minute on the minute: set work to 60 seconds and rest to 0, do the reps at the start of each minute and rest in the remaining time. Boxing and martial arts rounds, for example 3 minutes of work and 1 minute of rest for 12 rounds. Circuits with several stations, one station per round, and a longer break between laps as the rest between sets.