Zestimer: HIIT Interval Timer

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, circuits, and any interval workout, on iPhone and Apple Watch. Paste a YouTube workout and it becomes a timed, follow-along session. Or tell AI Coach what you want 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 any YouTube video and Zestimer turns it into a timed, follow-along session. COACHED BY AI Tell AI Coach what you want to train and get a ready-to-run workout. Fine-tune any exercise or timing with an inline AI prompt right in the builder — no starting from scratch. BUILD IN SECONDS Assemble circuits with rounds, work and rest times, and 224 illustrated moves. Reorder with a drag, edit every timing in one sheet, and favorite the workouts you repeat. 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 Dozens of preset workouts across Get Pumped, Get Stretched, Get Bigger, and Warm Up & Cool Down — plus a workout of the day picked for you. We don't track any data. Your workouts sync privately through iCloud. Zestimer Pro unlocks unlimited workouts and full AI coaching. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://zestimer.com/privacy