Interval Timer for HIIT | Cero vs Intervale

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/

Intervale is an interval timer for HIIT, Tabata, circuits, physio and rehab exercises, and stretching. Build a timer from your own named steps, give each its own work and rest time, and run it with spoken cues and haptics on iPhone or Apple Watch. - Build named timers from your own steps, each with its own work and rest time. - Add both sides of an exercise in one go, and keep the left and right times in step if you like. - Repeat for as many rounds as you like, with an optional rest between rounds. - Big, glanceable countdown with colour-coded work and rest, and what comes next always on screen. - Sounds, spoken cues and haptics mark every change, so you never need to look at your phone. They play over your music without turning it down. - Keeps running in the background and with the screen locked. - Choose the cue sound and volume, and set the sound and haptics for each timer separately. - Favourite timers and routines start from the Home Screen icon's quick actions. ROUTINES - Put timers together in a routine, in the order you want, with a break between each one. - A break can be a set time, or wait until you tap Start now. - Timers are linked, not copied, so changing a timer changes it in every routine that uses it. APPLE HEALTH - Save finished timers to Apple Health as a workout (HIIT, strength, core, yoga, Pilates and more) or as mindful minutes. Pick the type for each timer. - Your step names are saved with the workout, so you can see the work in the Health app. - On Apple Watch, workouts record your heart rate and active calories and count towards your Activity rings. - On iPhone with iOS 26 or later, the workout is recorded live and Apple measures your active calories. Intervale never estimates calories itself. - It is optional. Every timer works the same without Apple Health, and you can switch it off at any time. - Your Health data stays on your device and is never sent anywhere. SIRI AND SHORTCUTS - Say "Start Leg day rehab in Intervale" on iPhone or Apple Watch to run one of your timers. - Ask "What timers do I have in Intervale" to hear your list. - Both are available in the Shortcuts app too, so you can add a timer to an automation or your Home Screen. SHARE AND DISCOVER - Send a timer as a link in one tap, with no upload, or make a page with a QR code that you can set to expire or stop. - Add timers other people share with you, and see how often your own links were viewed and added. - Discover ready-made timers, and change them once they are yours. - Ask for one of your shared timers to be featured on Discover. It is reviewed before anyone else sees it. APPLE WATCH - Run your timers from the wrist with taps for every change, even with your wrist down. - Sessions file into History on your iPhone. ACCOUNTS (OPTIONAL) - Sign in with Apple, Google or an email code. You never have to: every timer works without an account. - Your timers appear on every device you sign in on. - Your shared links stay saved with your account, including on a new phone. - Delete your account in the app at any time. HISTORY AND FOLDABLES - History shows the workouts you have finished, with calories where they were saved. - On iPhone Duo, opened out sideways, your timers and the editor sit side by side, and the running timer shows the steps still to come. No ads, no tracking, no analytics. Without an account, everything stays on your device.