Interval Timer vs Interval Timer for HIIT | 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 customizable timer for high-intensity interval training (HIIT), Tabata, and other workout styles. It offers clear visual cues and sound notifications to guide users through work and rest periods, allowing them to focus on their exercise. Users can save routines, set reminders, and integrate with music playback.
- Customizable work and rest intervals
- Sound cues for phase transitions
- Background operation
- Landscape mode support
- Save custom routines
- Workout reminders
- Clear phase color indicators
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Set your work and rest intervals, press start, and focus on your workout. PureHIIT is a simple timer for HIIT, Tabata, EMOM, circuits, and boxing rounds. • Adjust work, rest, and round settings to suit your session. • Follow sound cues as you move from one phase to the next. • Keep listening to your music while you train. • Use the timer in the background or in landscape mode. • Start with a prebuilt routine or save your own. • Set workout reminders to help you keep a routine. Getting started is simple: choose a routine or set your intervals, check the number of rounds, and press start. Clear phase colors help you see when to work and when to rest. Free to download, with optional in-app purchases. Apple Watch features require Premium. On Apple Watch, the app integrates with Health to record heart rate and energy used. Make time for your next workout with PureHIIT. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Interval Timer for HIIT | Cero
Create custom interval workouts for HIIT, Tabata, and circuit training. Features adaptive heart rate training, Siri integration, and Apple Watch support. Track progress and share your custom routines.
- Customizable interval programming
- Adaptive heart rate training
- Siri and Shortcuts integration
- Apple Watch app
- Workout history and sharing
- Live Activities and Dynamic Island support
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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: Interval Timer for HIIT | Cero at every 3 days against Interval Timer's fortnightly. Interval Timer's advantage is iOS requirement (15.0 vs 18.0). 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 7 in-app purchases, starting at $3.99 per month and Interval Timer for HIIT | 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 — 4.8 for Interval Timer against 4.7 for Interval Timer for HIIT | Cero. Both are backed by a comparable volume of ratings — 297 and 438 respectively. Written reviews are what separate them: 73% of Interval Timer's written reviews are positive against 75% of Interval Timer for HIIT | Cero's.
Interval Timer ships an update fortnightly, Interval Timer for HIIT | Cero every 3 days. Both last shipped on November 6, 2026.
| Parameter | Interval Timer | Interval Timer for HIIT | Cero |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (297 ratings) — better | 4.7 (438 ratings) |
| Positive reviews | 73.3% of reviews | 74.6% of reviews — better |
| Number of ratings | 297 | 438 — better |
| Update frequency | Fortnightly | Every 3 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 45 MB | 50 MB |
| Age rating | +4 | 4+ |
| Developer | Miklos Pavel | Flawless Studio LLC |
Customer experience
Interval Timer
Interval Timer for HIIT | Cero
User reviews
Interval Timer
From 297 App Store ratingsWhat we love
- 👍 Easy to use
- 👍 Great timer functionality
- 👍 Can program intervals (warmup, activity, rest, cool down)
- 👍 Supports many rounds (up to 100)
- 👍 Ability to save workouts
Room to improve
- 💰 App became paid unexpectedly
- 💰 Premium required to start timer
- 💡 Round cap limits functionality for high rep activities
- 💡 Needs more than 30 intervals for some routines (e.g., stretching)
- 💡 Lacks a background click feature (e.g., every second)
Interval Timer for HIIT | Cero
From 438 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- Advertisements still present after paying for removal
- App requires premium to start timer (recent change)
Requested features
8 requests- Remove the cap on rounds
- Add a background click feature (e.g., every second)
- More sound options
- Option for more than one workout
- Add a halfway beep
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- Add a countdown for the workout interval
- Beep once at 15 seconds for a 30-second workout interval
- Countdown the last 3 seconds of a workout interval
Interval Timer for HIIT | 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
- Monthly$3.991 Month
- Yearly7 Days trial$19.991 Year
- Remove Ads$1.99
- Custom sounds$1.99
- Premium features$4.99
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- Premium features$9.99
- Premium features$14.99
Interval Timer for HIIT | Cero
- Cero Pro Monthly7 Days trial$2.991 Month
- Cero Pro$14.99
Questions
Is Interval Timer free?
Is Interval Timer for HIIT | Cero free?
Which has better reviews, Interval Timer or Interval Timer for HIIT | Cero?
Do Interval Timer or Interval Timer for HIIT | Cero have ads?
Which is updated more often, Interval Timer or Interval Timer for HIIT | Cero?
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