Set your work time, rest time and rounds once, then train hands-free: a prepare countdown, big WORK and REST labels, and beeps at every change tell you exactly where you are without looking at the clock math.
Popular setups: Tabata = 0 ready, 20 work, 10 rest, 8 rounds. EMOM training = 60 work, 0 rest, 10 rounds. Circuit = 40 work, 20 rest, 12 rounds.
An interval workout is a fixed timeline: prepare, then work and rest alternating, with rest only between rounds. This timer precomputes that timeline from your four numbers and then simply asks, on every refresh, “where are we on the timeline?” — answered from timestamps. That design matters mid-workout: phones throttle background tabs aggressively, and a naive ticking timer would quietly hand you longer rests. Here the phases stay honest, and the beeps (three for work, two for rest, five at the finish) mean you rarely need to look at the screen at all.
Free-form timing with lap splits for runs, swims and circuits.
Free — try itOne simple countdown with preset minutes and an alarm.
Free — try itThe work/rest pattern tuned for desk focus instead of exercise.
Free — try itWeekly totals and overtime for long-shift schedules.
Free — try itTabata is 20 seconds of work and 10 seconds of rest for 8 rounds, with no prepare time needed once you are warmed up: set Get ready 0, Work 20, Rest 10, Rounds 8. The whole block takes exactly 3 minutes 50 seconds because there is no rest after the final round.
No — the workout ends the moment the final work round ends, which is how interval training is normally programmed and how the totals in the worked example below are calculated.
So you can train by ear: three beeps mean a work round starts, two mean rest, and five mean the workout is finished. Sound needs one interaction first — pressing Start unlocks it.
Yes. Phases come from timestamps, not from counting updates, so when the screen wakes the timer is already in the correct phase with the correct seconds left. Keep the tab open and the volume up for the beeps.
Yes — boxing rounds are typically 180 seconds of work with 60 seconds of rest: set Work 180, Rest 60, Rounds 12, Get ready 10. Teachers also use it for station rotations: one work block per station, rest as the changeover.
The schedule is fully determined by your four settings:
With the defaults — prepare 10 s, work 30 s, rest 15 s, 8 rounds — the total is 10 + (8 × 30) + (7 × 15) = 10 + 240 + 105 = 355 seconds, i.e. 5 minutes 55 seconds. The last rest is the one that never happens: rests sit only between rounds, so 8 rounds need just 7 rests. At 3 minutes 25 seconds into the workout (205 seconds elapsed), the timeline says: prepare (10) + four full rounds of 45 s (180) = 190 seconds used, so you are 15 seconds into round 5’s work — exactly what the display shows.
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