Workout Interval Timer Lite vs HIIT Interval Timer | Cero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Workout Interval Timer Lite
This app coaches your workouts with customizable timers, allowing you to focus on training. It supports advanced features like location tracking and heart rate monitoring, with voice and audio cues for seamless interval management.
- Customizable interval timers (HIIT, Circuit, Custom, Simple)
- Location tracking for route and distance statistics
- Heart rate training with Bluetooth LE monitor support
- Voice and audio cues for interval notifications
- Workout history and iCloud synchronization
- Music integration for timers and intervals
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Let our timer to coach your workouts so you can focus on actual training without staring at the watch. This timer meets the needs of amateurs as well as professionals. It was designed to be flexible and highly customisable so it can be used for all kinds of trainings. There is one important difference between this app and other apps on the App Store. No need to change timer configuration when switching exercises all the time. Create and configure timers once and use them multiple times. For more demanding users timers can be composed into entire workouts. All timers and workouts can be categorized into groups. For each timer can be enabled location tracking. With enabled location tracking you can seethe route and location based statistics like distance, speed, pace and altitude. Another great feature is support for heart rate training using a Bluetooth LE heart rate monitor. User can create multiple profiles and switch between them. Heart rate training profile contains all settings for your training like heart rate zones and notification options. During exercising user can be notified about current heart rate and zone. One heart rate zone can be selected as target zone. Voice coaching can notify the user to adjust tempo to stay in current zone. The user interface is designed to be clear and readable from a distance. For notification can be used vibrations, sounds and also text to speech voice. No more looking at the screen to know the current interval. Each timer is composed from intervals. Each interval has a configurable name, duration, color and music. Music can be set also for whole timer. Your workout sessions can be saved into history where you can see how you performed during exercising. All your timers and workout history can be synchronized into iCloud. This app integrates with the Health app. Workout metrics can be exported to Apple Health app. Features: - Four timer types (HIIT, Circuit, Custom, Simple). - Support for Apple Health (only for Full Version) - Synchronization to iCloud (only for Full Version) - Heart rate training feature. - Location tracking feature. - Timer sounds: last seconds, every second, interval end, timer finish and metronome. - Timer vibrations: last seconds, interval end and timer finish. - Timer text to speech voice: interval name, next interval name, duration at beginning of interval, current interval time, counting down for last seconds and timer finish. - Timers can be easily shared and duplicated. - Timers can be categorised into groups. - Timer music (playlist, album or song). - Multiple screens for running timer with different stats: Map, Location, Heart Rate, Timer, Intervals and Music - User can configure visual style for timer screens. - Screens for running timer can be locked. - Each interval has configurable duration, name, color and music. - Runs and plays music on background. - Universal app, works on iPhone and iPad. - Max interval duration is 99 hours 59 minutes and 59 seconds. - Max number of sets is 999. Free version includes ads and other restrictions that can be removed with InApp Purchases. If you have enable Track Location option please note: Continued use of GPS running in the background can dramatically decrease battery life.
HIIT Interval Timer | Cero
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.
- 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
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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/
Screenshots
Verdict
The clearest difference is ads: Workout Interval Timer Lite at none against HIIT Interval Timer | Cero's shown. Workout Interval Timer Lite also leads on review sentiment (89% vs 75%) and iOS requirement (12.0 vs 16.0). HIIT Interval Timer | Cero's advantage is update cadence (every 3 days vs every 5 weeks). On price, rating, ratings volume and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Workout Interval Timer Lite sells 6 one-off in-app purchases and HIIT Interval Timer | Cero sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for Workout Interval Timer Lite against 4.7 for HIIT Interval Timer | Cero. Both are backed by a comparable volume of ratings — 248 and 435 respectively. Written reviews are what separate them: 89% of Workout Interval Timer Lite's written reviews are positive against 75% of HIIT Interval Timer | Cero's.
Workout Interval Timer Lite ships an update every 5 weeks, HIIT Interval Timer | Cero every 3 days. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.
| Parameter | Workout Interval Timer Lite | HIIT Interval Timer | Cero |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (248 ratings) | 4.7 (435 ratings) — better |
| Positive reviews | 89.4% of reviews — better | 74.6% of reviews |
| Number of ratings | 248 | 435 — better |
| Update frequency | Every 5 weeks | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 36 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | DenciSoft s.r.o. | Flawless Studio LLC |
Customer experience
Workout Interval Timer Lite
HIIT Interval Timer | Cero
User reviews
Workout Interval Timer Lite
From 248 App Store ratingsWhat we love
- 👍 User-friendly and easy to use
- 💡 Highly customizable workouts
- 🚀 Efficient interval timers
- 🌟 Great sound effects and cues
- 🎨 Visually appealing design and color schemes
Room to improve
- ⚠️ Deceptive free version limitations
- 💸 App feels expensive to some
- 🚫 Ads in paid version (reported by one user)
- 🎶 Music playback issues (stops randomly, restarts after pause)
- 🔊 Interval sounds not working consistently
HIIT Interval Timer | Cero
From 435 App Store ratingsWhat we love
- 👍 Simple and straightforward
- 👍 Very practical and customizable
- 👍 Great for HIIT and Tabata
- 👍 Clear design and easy to use
- 👍 Good value, no subscription
Room to improve
- 🔋 Drains battery
- 🎶 Music playback interrupted
- ⚠️ Ads interrupt timers
- 🔊 Weak or non-functional sound/haptics
- 🔄 Forced updates
Bugs and requests
Workout Interval Timer Lite
Reported bugs
5 issues- Music stops during workouts randomly
- Interval sounds don't work half the time
- Ads appear in the paid no-ad version
- Music restarts after a pause even when 'play through pauses' is selected
- Asking to save workout after every timer use can be burdensome
Requested features
6 requests- Add a "for time" timer option
- Add lock screen notifications after each interval
- Add Apple Watch support
- Add a function to flash at the last 5 or 3 seconds of an interval
- Option to turn off workout saving after each timer use
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- Allow songs to start at a random point
HIIT Interval Timer | Cero
Reported bugs
4 issues- 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
Requested features
5 requests- 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
In-app purchases
Workout Interval Timer Lite
- Unlimited Custom Timers$0.99
- Unlimited Simple Timers$0.99
- Remove Ads$1.99
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- Unlimited Circuit Timers$1.99
- Unlimited HIIT Timers$1.99
- Full Version$4.99
HIIT Interval Timer | Cero
- Cero Pro Monthly7 Days trial$2.991 Month
- Cero Pro$14.99
Questions
Is Workout Interval Timer Lite free?
Is HIIT Interval Timer | Cero free?
Which has better reviews, Workout Interval Timer Lite or HIIT Interval Timer | Cero?
Do Workout Interval Timer Lite or HIIT Interval Timer | Cero have ads?
Which is updated more often, Workout Interval Timer Lite or HIIT Interval Timer | Cero?
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