# Interval Timer \| Cero β€” HIIT, Tabata Workouts and Yoga > Customizable interval timer for HIIT, Tabata, yoga, and other fitness workouts. (iPhone/iPad app by Flawless Studio LLC.) - Source: https://appshunter.io/ios/app/interval-timer-cero/id1256319392 (this page in markdown: same URL + `.md`) - Developer: [Flawless Studio LLC](https://appshunter.io/developer/1228312508) - Category: Health & Fitness, Sports - Price: Free with in-app purchases - Rating: 4.70/5 from 435 App Store ratings Β· 58 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 Β· 36 MB - Languages: Korean, Danish, German (Germany), Russian, Malay, Norwegian BokmΓ₯l, Swedish, European Spanish, Arabic, American English and 10 more - Released: 2017-07-15 - Data updated: 2026-08-19 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/interval-timer-cero/id1256319392/reviews.md ## What is Interval Timer | Cero? Cero is the interval timer you were waiting for! It will enhance your workouts: HIIT, Tabata, running, yoga, WOD, strength training, MMA, stretching, circuit training, boxing... INTUITIVE AND EASY TO USE A neat design and a hugely intuitive interface to make your User Experience absolutely great! SIMPLE AND ADVANCED TIMER MODES Two different timer modes. Set them up in just a few seconds. You'll be able to choose between the simple mode (the most popular and easy to configure). Or the advanced one, which is thought for those of you who need a highly customized experience. CLEAR INTERFACE Everything is thought to give you the maximum customization in your timers, without driving you crazy. CREATE YOUR OWN CUSTOM INTERVALS You'll be able to create your own intervals. Just choose the icon it represents the most, the color, and the calorie expenditure level. SAVE MULTIPLE WORKOUT TIMER SETTINGS Just create and save as many timers as you need, without limitations! AVAILABLE FOR YOUR APPLE WATCH Cero is also compatible with Apple Watch, and it even has a heart monitor! Great for all those outdoor activities that require having the count of intervals. CALORIE TRACKER The calorie expenditure of each workout will be saved into Apple Health automatically! SYNC BETWEEN DEVICES Cero automatically syncs your timers and settings across all your devices! Forget about having to configure, again and again, your interval timers. PEOPLE LOVE CERO! With a 4.8 stars average worldwide and tens of thousands of users using it frequently! "The High-Quality Timer I needed. Man, this is such a well made app. Intuitive, simple when it needs to be, complex (but not complicated) when needed as well." -Bobthetheman "Great app! Cero keeps me on track toward my fitness goals. Download it. Use it. See the change." -Karina_Soto "Great HIIT timer! Wonderful app with beautiful UI, easy to use, and maintained by an attentive developer. Keep up the good work" -mjeshurun "Everything you need from a timer. This app is simple and gives me everything I was looking for. Great timer for HIIT training." -Hubert Z. Feedback and suggestions: support@cero.app ## Key features - Customizable interval timers - Simple and advanced timer modes - Create and save multiple workout settings - Apple Watch compatibility with heart monitor - Automatic calorie tracking to Apple Health - Cross-device sync ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Cero Pro | $3.99 | one-time | ## What do users think of Interval Timer | Cero? Overall sentiment: positive **Pros** - πŸ‘ Simple and straightforward - πŸ‘ Very practical and customizable - πŸ‘ Great for HIIT and Tabata - πŸ‘ Clear design and easy to use - πŸ‘ Good value, no subscription - πŸ‘ Works as expected - πŸ‘ Versatile for various workouts - πŸ‘ Intuitive and functional **Cons** - πŸ”‹ Drains battery - 🎢 Music playback interrupted - ⚠️ Ads interrupt timers - πŸ”Š Weak or non-functional sound/haptics - πŸ”„ Forced updates - 🧭 Back button change on Apple Watch **Commonly reported bugs** - App runs in background draining battery - Rotation broke after update - Apple workout app overrides Cero app on Apple Watch - Interval signals too weak or not working **Most requested features** - Ability to group timers - Option to add warm-up and cool-down features - Ability to type numbers for time adjustment - Timer sounds through headphones or interrupting music - Ability to change exercise names ## Recent user reviews (10 of 58) All indexed reviews: https://appshunter.io/ios/app/interval-timer-cero/id1256319392/reviews.md ### 5/5 β€” Cero *2026-02-15, version 3.7.3* Dommage que l'on puisse pas changer le nom des exercices ### 5/5 β€” Excellent *2026-02-09, version 3.7.3* Works as it should. ### 1/5 β€” Ads interrupt timers *2025-12-23, version 3.7.3* Why would I bother with this? ### 3/5 β€” Parfait *2025-05-20, version 3.7.1* L’application est trΓ¨s bien faite, tant visuellement, que dans sa comprΓ©hension ### 5/5 β€” Awesome! *2025-01-23, version 3.5.7* Very simple and straightforward 😎 ### 5/5 β€” Great *2024-12-30, version 3.5.7* Best I have used ### 5/5 β€” HIIT *2024-12-16, version 3.5.7* Parfait ### 4/5 β€” Great simple workout timer app *2024-10-24, version 3.5.7* App works great for creating flexibility routines. Would love for there to be a way to group timers together to better manage related timers. ### 5/5 β€” Great *2024-09-08, version 3.5.7* Love it ### 5/5 β€” Great Tabata tool! *2024-09-07, version 3.5.7* This Tabata app is my favorite. ## Frequently asked questions about Interval Timer | Cero ### What does the Interval Timer | Cero app do? This app serves as a versatile interval timer designed to enhance a wide range of workouts, including HIIT, Tabata, running, yoga, and strength training. It offers intuitive controls and customizable features to help users manage their workout intervals effectively. ### What are the key features of Cero? Key features include simple and advanced timer modes, the ability to create and save custom intervals with unique icons and colors, automatic calorie expenditure tracking to Apple Health, and seamless syncing of timers and settings across all your devices. It also offers Apple Watch compatibility with a heart monitor. ### Is Cero free to use? The app is free to download and use, offering a robust set of features. It also includes in-app purchases, suggesting that some advanced functionalities or customization options might be available for purchase. ### What devices is Cero compatible with? Cero is designed for use on iOS devices and is also compatible with Apple Watch, providing a heart monitor for outdoor activities. The app automatically syncs settings across all your devices, ensuring a consistent experience. ### How can Cero help with my workouts? Cero helps users stay on track with their fitness goals by providing a clear and customizable interval timer. Whether you're doing HIIT, Tabata, or yoga, the app allows you to set up precise intervals, track your progress, and monitor calorie expenditure, making your workouts more efficient and effective. ## Version history (last 5 releases) ### 3.7.3 β€” 2025-06-18 - Solve minor issues ### 3.7.2 β€” 2025-06-03 - Solve minor issues ### 3.7.1 β€” 2025-04-03 - Solve minor issues ### 3.7.0 β€” 2025-04-02 - Translated Cero to Korean, Japanese, Malay, Thai, Arabic, Indonesian, Norwegian, Danish, Swedish, and Finnish - Solved minor issues ### 3.6.4 β€” 2025-03-30 - Performance improvements ## Apps similar to Interval Timer | Cero | App | Rating | Price | Category | | --- | --- | --- | --- | | [Interval Timer - Tabata Timer](https://appshunter.io/ios/app/interval-timer-tabata-timer/id406473568) | 4.5 (19,032) | Free | Health & Fitness | | [Interval Timer β–‘ HIIT Timer](https://appshunter.io/ios/app/interval-timer-hiit-timer/id1124297113) | 4.8 (85,854) | Free | Health & Fitness | | [Tabata Timer: Interval Timer.](https://appshunter.io/ios/app/tabata-timer-interval-timer/id1255964203) | 4.9 (9,173) | Free | Health & Fitness | | [Timer Tabata for Workout, HIIT](https://appshunter.io/ios/app/timer-tabata-for-workout-hiit/id756930454) | 4.7 (513) | Free | Health & Fitness | | [HIIT β€’ Workouts & Timer](https://appshunter.io/ios/app/hiit-workouts-and-timer/id891535485) | 4.8 (31,065) | Free | Health & Fitness | | [Seconds Interval Timer](https://appshunter.io/ios/app/seconds-interval-timer/id475816966) | 4.7 (23,504) | Free | Health & Fitness | ## More apps by Flawless Studio LLC - [Irregular Verbs: Learn English](https://appshunter.io/ios/app/irregular-verbs-learn-english/id1543574299) - [Tabata & HIIT Timer \| Cero Pro](https://appshunter.io/ios/app/tabata-and-hiit-timer-cero-pro/id1569959638) - [AI Calorie Counter: FitCounter](https://appshunter.io/ios/app/ai-calorie-counter-fitcounter/id6498909414) All apps by Flawless Studio LLC: https://appshunter.io/developer/1228312508 ## Related topics [ares interval](https://appshunter.io/ios/topics/ares-interval) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-19.*