Zestimer: HIIT Interval Timer

Paste a YouTube video or Shorts — Zestimer makes it a timed workout with voice cues. Or just say what you want and AI builds it. Run it on your wrist, cast it to the TV.

Never watch the clock again. Zestimer calls every switch — work, rest, round — with voice and haptics, so you can just move. Built for HIIT, Tabata and circuits, and just as good for stretching, yoga and a slow warm-up, on iPhone and Apple Watch.

Paste a YouTube video or Shorts and it becomes a timed workout. Or tell AI Coach what you want — out loud, if your hands are busy — and get a ready-to-run circuit in seconds.

A TIMER YOU CAN FEEL A big glass dial counts every interval with color, sound, and haptics — orange for work, green for rest. Play your favorite music from Spotify or Apple Music while Zestimer keeps your workout on track. Your screen stays awake, and one long press ends the session.

FROM A VIDEO TO A WORKOUT Paste a YouTube link — a full class or a 30-second Shorts — and Zestimer lays it out as a timed workout you can run. Search YouTube without leaving the app, or copy a link anywhere and Zestimer offers to convert it the moment you come back. Every workout keeps a credit to the original video and channel.

COACHED BY AI Tell AI Coach what you want to train — type it, or just say it out loud — and get a ready-to-run workout. Already have one? Describe the change in a sentence and AI edits it in place: swap a move, shorten the rest, add a round. No starting from scratch.

BUILD IN SECONDS Assemble circuits with rounds, work and rest times, and 118 illustrated moves — every one of them equipment-free. Reorder with a drag, edit every timing in one sheet, and favorite the workouts you repeat.

ON YOUR WRIST, ON YOUR TV Run the whole workout from Apple Watch, with taps you feel through every switch. Or connect a TV or external display and the current move fills the screen, big enough to read from across the room — your phone stays the remote.

STAY ON A ROLL Streaks with earned freezes, weekly goals, lifetime stats, and Home Screen widgets keep your momentum visible — and a share card makes your progress story-ready for Instagram.

READY-MADE WORKOUTS 24 preset workouts behind two doors, HIIT and Stretch.

We don't track any data. Your workouts sync privately through iCloud.

Zestimer Pro unlocks unlimited workouts and full AI coaching.

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