Interval Timer vs HIIT Interval Timer | Cero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Interval Timer
This app provides a simple and intuitive interval timer for workouts like HIIT, EMOM, and CrossFit. It features quick setup, guiding tones and colors, and background functionality to keep you focused on your training.
- Instant interval setup
- Guiding tones and colors
- HealthKit integration
- Background functionality
- Save and sync favorite timers
- Preparation countdown
- Pause and resume workouts
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Discover the World’s Simplest Interval Timer — Bit Timer gets you off your phone or watch and into your workout in no time. ---------------- Key Features: Instant Setup — With a clean, no-frills design, set your work, rest, and repeat intervals in seconds. Guiding Tones and Colors — Navigate your workout with distinct tones and colors for each phase, keeping you on track effortlessly. Seamless HealthKit Integration (watchOS) — Automatically save your workouts and close those rings with Apple Health integration. Background Functionality — Keep your workout going even when your phone is locked or you’re using other apps, thanks to sound and haptics. Favorites Sync — Save and sync your favorite timers across iPhone, iPad, and Apple Watch for quick access. Why You’ll Love Bit Timer: - Quick Setup: Press and drag to set work, rest, and repeat intervals swiftly. - Preparation Countdown: Get ready with a 10-second countdown before your workout starts (3 seconds on Apple Watch). - Clear Audio Cues: Three distinct sounds indicate different stages of your workout, ensuring you stay on track. - Warning Tone: A countdown tone alerts you before the work phase begins. - Pause & Resume: Pause your workout anytime and resume right where you left off. - Easy Reset: Start from the beginning if interrupted, with a simple reset. ----------- Bit Timer promises to be the ‘World’s Simplest Interval Timer Ever.’ It is.” - Fast Company Design.* ----------- Privacy Policy: https://www.bittimer.com/privacy-policy Terms of Service: https://www.bittimer.com/terms-of-service End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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: Interval Timer at none against HIIT Interval Timer | Cero's shown. HIIT Interval Timer | Cero's advantage is update cadence (every 3 days vs every 4 weeks). On price, rating, review sentiment and ratings volume 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. Interval Timer sells 4 in-app purchases, starting at $1.99 per month 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 Interval Timer against 4.7 for HIIT Interval Timer | Cero. Both are backed by a comparable volume of ratings — 534 and 435 respectively. Written reviews are what separate them: 77% of Interval Timer's written reviews are positive against 75% of HIIT Interval Timer | Cero's.
Interval Timer ships an update every 4 weeks, HIIT Interval Timer | Cero every 3 days. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.
| Parameter | Interval Timer | HIIT Interval Timer | Cero |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (534 ratings) — better | 4.7 (435 ratings) |
| Positive reviews | 76.8% of reviews — better | 74.6% of reviews |
| Number of ratings | 534 — better | 435 |
| Update frequency | Every 4 weeks | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Peiter Buick | Flawless Studio LLC |
Customer experience
Interval Timer
HIIT Interval Timer | Cero
User reviews
Interval Timer
From 534 App Store ratingsWhat we love
- 🚀 Simple and easy to use
- 👍 Elegant and intuitive design
- ✨ Effective for interval training
- 💯 Works great for the basics
Room to improve
- 🔒 Paid app now requires subscription
- 💰 Asking users to pay again after initial purchase
- 🔇 Audio cues too quiet
- ⏱️ Limited to 4 minutes of work time
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
Interval Timer
Reported bugs
2 issues- Timer continues counting down even after app is closed
- Issues with music volume reduction while app is in use
Requested features
4 requests- Ability to save and load custom workout routines
- Option to increase work interval duration beyond 4 minutes
- Apple Watch app integration
- More sound effect options
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
Interval Timer
- Bit Timer Pro$1.991 Month
- Bit Timer Pro$4.991 Year
- Bit Timer Pro$9.991 Year
- Bit Timer Pro Lifetime$17.99
HIIT Interval Timer | Cero
- Cero Pro Monthly7 Days trial$2.991 Month
- Cero Pro$14.99
Questions
Is Interval Timer free?
Is HIIT Interval Timer | Cero free?
Which has better reviews, Interval Timer or HIIT Interval Timer | Cero?
Do Interval Timer or HIIT Interval Timer | Cero have ads?
Which is updated more often, Interval Timer or HIIT Interval Timer | Cero?
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