Twenty seconds on, ten seconds off, eight rounds — ready the moment you open the app. Then build any interval you want, and run it without touching the screen.
Tabata is 8 rounds of 20 seconds all-out work and 10 seconds rest — four minutes total. It comes from Dr. Izumi Tabata's research on high-intensity interval training. The format is brutally simple; the hard part is keeping the count while your lungs are on fire. That's the timer's job.
No setup, no math. RoundBlitz ships with Tabata already built: 8 rounds × 20s work / 10s rest, a buzzer on every transition, and a 5-second warning before each round ends. Open the app, load it, start.
Tabata is one preset — not a limit. Build unlimited custom intervals: any rounds, work, rest, warning and prepare time. HIIT, EMOM, circuits, sprints, whatever you train.
Twenty seconds of burpees doesn't leave a free hand. RoundBlitz reads hand signs with your camera, so you can pause, restart or skip an interval from wherever you've collapsed — no reaching for the screen, no breaking the set.
Fully remappable in Settings → Gesture Control.
The bits that matter when you're four minutes deep and not thinking straight.
Start, pause and skip intervals from your wrist. The count is right there when your phone is across the room.
A buzzer on every switch and a countdown for the final 5 seconds — so you know the rest is ending without looking.
A big, color-coded display — red for work, cyan for rest — legible across the room, in landscape or portrait.
Every session ends with a summary: rounds completed, total work and rest time, estimated calories, and a full timeline of the intervals you actually finished.
Tabata is a high-intensity interval format of 8 rounds, each with 20 seconds of all-out work followed by 10 seconds of rest — 4 minutes in total. It comes from research by Dr. Izumi Tabata on high-intensity interval training.
Yes. RoundBlitz ships with a ready-made Tabata preset — 8 rounds of 20 seconds work and 10 seconds rest, with a buzzer and a 5-second warning before each round ends. Load it and start; no setup required.
Yes. You can create unlimited custom presets with any number of rounds and any work, rest, warning and prepare durations — so it works for HIIT, EMOM, circuits, sprints or any interval scheme you train.
Yes. Tabata is one preset, but RoundBlitz is a general interval timer: set your own work and rest periods and round count for any HIIT or circuit workout, and save it as a preset you can reuse.
Yes. RoundBlitz includes an Apple Watch companion app that mirrors the timer, so you can start, pause and skip intervals from your wrist without touching your phone.
RoundBlitz reads hand signs with your device's front camera. An open palm starts or stops the timer, a peace sign restarts it, and pointing skips ahead — useful when you're on the floor mid-burpee and can't reach the screen.
RoundBlitz is a one-time purchase of $4.99 with everything unlocked — no subscriptions and no locked features.
Get RoundBlitz and start your next Tabata in two taps.
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