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Interval Timer & HIIT Trainer
Type a workout in plain text. Watch it come alive as a timed, hands-free trainer that counts you down, calls out every move, and never misses a beat — even with your phone locked. Workout Crazy is the fastest way to turn a plan into a session. Write "Push ups 30, Rest 15, Squats 45" and the app builds the intervals, adds the rests, and plays the whole thing back like a presenter: a big countdown, the current move front and center, and voice + beep cues so you never have to look down. TYPE IT, TRAIN IT Write your workout the way you'd text it to a friend — one move per line, in seconds, minutes, or MM:SS. "3 rounds:" repeats a block. The parser handles the rest (literally — it inserts your rests for you). A PRESENTER, NOT JUST A TIMER A giant countdown, the next move always in view, warning beeps, and spoken cues. Instructor mode is built for leading a class out loud. WORKS WHILE LOCKED Lock your phone, drop it in your pocket, keep moving. Cues keep firing, and a Live Activity + Dynamic Island keep the countdown on your Lock Screen. ON YOUR WRIST A full Apple Watch app with haptics, so you can leave the phone behind. SHARE & DISCOVER Publish your best workouts to the Community and pull in others' — moderator-approved, no spam. Send any workout to a friend with a link that opens right in their library. YOURS, EVERYWHERE iCloud sync keeps your library on every device. History and streaks track what you've done. HANDS-FREE WITH SIRI "Start my workout." Pause, skip, and end — all by voice or Shortcuts. PRIVATE BY DESIGN No account. No ads. No tracking. Your workouts stay on your device. GO PRO — ONE PURCHASE, FOREVER Unlimited workouts, plus every future Pro feature. One-time purchase, no subscription. Type a line. Press play. Go crazy.
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Google Play only. Downloads from daily Top free ranks (or the store's install count); in-app revenue from Top grossing ranks, calibrated on AppTweak's US estimates, or else from downloads; ads from public ad benchmarks. Not reported figures.