HIIT Interval Timer | Cero vs HIIT Timer

Build an interval workout around the way you train. Cero is a flexible interval timer for HIIT, Tabata, circuit training, WODs and HYROX preparation. Set up a quick work/rest timer or program each interval in detail. Distinct colors, large controls and reliable cues keep you focused on the session instead of the clock. BUILD YOUR SESSION • Set work, recovery, sets, warm-up and cool-down. • Create advanced workouts with custom intervals, colors, icons and intensity levels. • Save, duplicate and reorder timers. • Share timers by file or QR code. • Review completed sessions in workout history. STAY IN THE WORKOUT • Follow compatible sessions with Live Activities and Dynamic Island. • Start saved or recent timers from Home Screen widgets. • Use Siri and Shortcuts to start, pause, resume and stop a timer. • Put Gym Display on a larger screen or mirrored TV. • Choose a default song or assign music to individual intervals. • Customize sounds, voice cues, vibrations and background alerts. TRAIN BY HEART RATE Adaptive HR can extend recovery until you reach your target heart rate, then guide hard efforts with low and high alerts. Pair a Bluetooth heart-rate monitor with iPhone or train with heart-rate data from Apple Watch. COUNTDOWN AND STOPWATCH The built-in countdown and lap stopwatch cover warm-ups, station changes, rest periods and race-day practice. Stopwatch sessions continue after you close and reopen the app. ON APPLE WATCH Run saved workouts from your wrist, follow heart rate and use the standalone countdown and stopwatch. Cero can save completed workouts and estimated calories to Apple Health. Automatic iCloud backups help protect saved timers and custom intervals. Useful for HIIT, Tabata, circuits, EMOM-style workouts, boxing rounds, strength and conditioning, indoor cycling, running intervals and hybrid race preparation. Feedback and suggestions: hi@flawless.studio Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

A simple interval timer for HIIT, Tabata, EMOM, and AMRAP workouts. All features are free with ad support. No account. No subscription. No usage limits. ◆ Four workout modes 【HIIT】 Set your own work time, rest time, and rounds. Built for classic high-intensity interval training your way. 【Tabata】 The 20s-on / 10s-off × 8 protocol. One tap to start the original. 【EMOM (Every Minute On the Minute)】 Repeating one-minute intervals. Built for CrossFit, strength training, and conditioning sessions. 【AMRAP (As Many Rounds As Possible)】 Set a time cap and count your rounds. Push the limit. ◆ Keep your streak alive ・Calendar view of every workout day ・Daily streak counter to keep the momentum ・Monthly workout totals at a glance ◆ Save your favorites Save your most-used presets. One tap to start next time. ◆ Smart reminders Weekly reminders that gently push you back on track when you miss a session. ◆ Built to stay out of your way ・No account required. Open the app, set the timer, train ・No bloated features, no upsells, no data harvesting ◆ Made for ・Home HIIT and bodyweight workouts ・Tabata protocols, including custom variations ・Strength training intervals ・Running and cardio circuits ・Yoga and stretching session timing ・CrossFit-style EMOM and AMRAP WODs ・Functional fitness and conditioning No account. No subscription. Just set the timer and go.