FEATURES
Cero’s features
Everything the Cero interval timer does, on iPhone, iPad and Apple Watch
Cero is an interval timer for HIIT, Tabata, circuits, boxing rounds, running and more. Every feature on these pages is free; Cero Pro adds unlimited saved timers and removes the ads. See free and Pro.
- FeatureCero on Apple WatchYour saved timers on your wrist, your heart rate through the session, and a countdown and stopwatch on hand
- FeatureTrain by heart rate with Adaptive HRRest until your heart rate is ready, and get a warning when a hard interval is too easy or too hard
- FeatureWidgets, Live Activities and SiriStart a timer from your Home Screen or with your voice, and follow it on the Lock Screen and in the Dynamic Island
- FeatureMusic, sounds and voice cuesHear every change without looking: your own cues, your own soundtrack, and a big-screen Gym Display
- FeatureCountdown and lap stopwatchFor rest between sets, station changes and race practice, beside your interval timers
- FeatureCustom interval timerBuild any workout interval by interval, with its own names, colors and icons, from a quick template or from scratch
- FeatureGym Display: your timer on a TVThe time left, the set and what’s next, big enough for a whole room, on any AirPlay TV or connected display
- FeatureWorkout history and Apple HealthEvery completed session in one place, a recap to share, Apple Health, and export to CSV or PDF
- FeatureCero free and Cero ProEvery timer and feature is free. Pro is for saving more timers, without ads
- FeatureYour timer on the Lock Screen and in the Dynamic IslandSee the time left, the interval and the set without unlocking, and pause or skip from the Lock Screen
- FeatureVoice cues: a talking interval timerHear what’s next and how long it lasts, so you never look at the screen mid-set
YOUR NEXT SESSION STARTS HERE
Bring the effort.
We’ll keep the time.
Cero is free to download for iPhone, iPad and Apple Watch.
Download Cero
Cero is a timer, not a medical device. If you’re new to hard exercise, are pregnant or have a health condition, check with your doctor first, and stop if you feel unwell.