This interval timer app enhances various workouts like HIIT, Tabata, and yoga with intuitive design and customizable timer modes. Create and save custom intervals, track calorie expenditure, and sync settings across devices, including Apple Watch.
Summarized from real user reviews of Interval Timer | Cero. Based on 435 reviews and a 4.7/5 average, it highlights the 8 positives and 6 negatives reviewers mention most about this Health & Fitness app.
4.0.1
September 14, 2026
Your timer can do a lot more now: • Adaptive HR can extend recovery until you reach your target heart rate and guide hard efforts with low and high alerts. • Timer Music lets you choose a default song or set different music for individual intervals. • Live Activities and updated Dynamic Island layouts keep compatible sessions visible and within reach. • Home Screen widgets, Siri and Shortcuts make saved timers quicker to start and control. • Gym Display gives you a clearer view on a large screen or mirrored TV. • Share and import timers with a file or QR code, review completed sessions in workout history, and protect your setup with automatic iCloud backups. • A configurable lap stopwatch is now available on iPhone. Countdown and Stopwatch have also arrived on Apple Watch. • The refreshed design includes a new app icon and improvements to timer reliability, background alerts and heart-rate connections. A useful update for HIIT, Tabata, circuit training and HYROX preparation.
More$3.99
Cero Pro
Remove ads and get additional features
4 issues
App runs in background draining battery
Rotation broke after update
5 requests
Ability to group timers
Option to add warm-up and cool-down features
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.
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.
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.
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.
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.
