HIIT vs HIIT Interval Timer | Cero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HIIT
This app offers short, high-intensity interval training (HIIT) workouts that can be done anywhere with no equipment. It provides scientifically proven exercises, custom timer templates, and progress tracking to help users achieve fitness results quickly.
- Short, high-intensity workouts
- Customizable timer templates
- Step-by-step instructions
- Calendar and weight tracking
- Voice and video guidance
- Apple Health integration
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Get our HIIT Workout app to get results FAST! Just 4 minutes of high intensity tabata intervals training will make you sweat and get your heart pumping. Replace long cardio workouts with shorter and more effective HIIT workouts. No equipment needed. Workout anytime,anywhere. No excuses. Features: • Scientifically proven short high intensity workouts to improve your health. • Custom templates so you can build your own timers. • Step by step instructions suitable for beginners and intermediates alike. • Calendar and weight tracker to track your progress. • Voice and video instructions. It's like having a personal trainer in your pocket. • This app is integrated with Apple Health to track your workouts,calories and weight. Free,quick and effective. What are you waiting for? Download the app,and get sweating! 7M - We heart fitness! SUBSCRIPTION PRICING AND TERMS We offer the following auto-renewing subscriptions: $29.99 per year $2.99 per week These prices are for United States customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence. The subscription will automatically renew unless turned off in your iTunes Account Settings at least 24 hours before current period ends. You can go to your iTunes Account settings to manage your subscription and turn off auto-renew. Your iTunes Account will be charged when the purchase is confirmed. If you subscribe before your free trial ends,the rest of your free trial period will be forfeited as soon as your purchase is confirmed. Read more about our terms and conditions here: Terms of Use: https://7mfitness.com/terms-of-use/ Privacy Policy: https://7mfitness.com/privacy-policy/
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 update cadence: HIIT Interval Timer | Cero at every 3 days against HIIT's monthly. HIIT's advantage is ratings volume (31K vs 435) and review sentiment (91% vs 75%). On price, rating, ads 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. HIIT sells 11 in-app purchases, starting at $2.99 per 7 days and HIIT Interval Timer | Cero sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.8 for HIIT against 4.7 for HIIT Interval Timer | Cero. That said, the two scores are not equally well evidenced: HIIT has 31K ratings behind it against 435, so its average is the more settled of the two. Written reviews are what separate them: 91% of HIIT's written reviews are positive against 75% of HIIT Interval Timer | Cero's.
HIIT ships an update monthly, HIIT Interval Timer | Cero every 3 days. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.
| Parameter | HIIT | HIIT Interval Timer | Cero |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (31K ratings) — better | 4.7 (435 ratings) |
| Positive reviews | 90.8% of reviews — better | 74.6% of reviews |
| Number of ratings | 31K — better | 435 |
| Update frequency | Monthly | Every 3 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 159 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Fast Builder Limited | Flawless Studio LLC |
Customer experience
HIIT
HIIT Interval Timer | Cero
User reviews
HIIT
From 31K App Store ratingsWhat we love
- 👍 Variety and flexibility of workouts
- 🚀 Easy to follow and effective workouts
- 💪 Workouts challenge users and help them see results
- 🎨 Good range of difficulty levels
- ⏱️ Convenient short workout options
Room to improve
- 🐛 Some workouts are too easy or repetitive
- 🔇 Lack of music or audio guidance during workouts
- 💰 Concerns about paid subscription model
- 🤔 Lack of modifications or low-impact options
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
HIIT
Reported bugs
2 issues- Some videos or links not working
- Occasional crashes or performance issues
Requested features
4 requests- Option to create custom workouts
- More workout types beyond just HIIT
- Integration with fitness tracking apps
- Ability to save favorite workouts
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
HIIT
- Lock-in our cheapest price!3 Days trial$2.997 Days
- 7M Pro$2.997 Days
- Get Yearly Premium!$9.991 Year
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- Interval Timer Pro + Workouts$12.991 Month
- Interval Timer X premium7 Days trial$19.993 Months
- 7M Pro$19.993 Months
- Get Monthly Premium!$19.991 Month
- Get Yearly Premium!$19.991 Year
- Interval Timer X premium$29.991 Year
- 7M Pro7 Days trial$29.991 Year
- Interval Timer Pro + Workouts7 Days trial$39.991 Year
HIIT Interval Timer | Cero
- Cero Pro$3.99
Questions
Is HIIT free?
Is HIIT Interval Timer | Cero free?
Which has better reviews, HIIT or HIIT Interval Timer | Cero?
Do HIIT or HIIT Interval Timer | Cero have ads?
Which is updated more often, HIIT or HIIT Interval Timer | Cero?
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