# Interval Timer □ HIIT Timer vs HIIT Interval Timer | Cero

The clearest difference is ads: Interval Timer □ HIIT Timer at none against HIIT Interval Timer | Cero's shown. Interval Timer □ HIIT Timer also leads on ratings volume (86K vs 435). HIIT Interval Timer | Cero's advantage is update cadence (every 2 weeks vs every 5 weeks) and review sentiment (75% vs 61%). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Interval Timer □ HIIT Timer sells 5 in-app purchases, starting at $1.99 per month 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 Interval Timer □ HIIT Timer against 4.7 for HIIT Interval Timer | Cero. That said, the two scores are not equally well evidenced: Interval Timer □ HIIT Timer has 86K ratings behind it against 435, so its average is the more settled of the two. Written reviews are what separate them: 61% of Interval Timer □ HIIT Timer's written reviews are positive against 75% of HIIT Interval Timer | Cero's.

Interval Timer □ HIIT Timer ships an update every 5 weeks, HIIT Interval Timer | Cero every 2 weeks. The most recent releases landed on September 24, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Interval Timer □ HIIT Timer | HIIT Interval Timer | Cero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (86K ratings)](https://appshunter.io/ios/app/interval-timer-hiit-timer/id1124297113/reviews)** | [4.7 (435 ratings)](https://appshunter.io/ios/app/hiit-interval-timer-cero/id1256319392/reviews) |
| Number of ratings | **86K** | 435 |
| Positive reviews | 60.7% of reviews | **74.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 34 MB | 42 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Float Tech, LLC](https://appshunter.io/developer/483697886) | [Flawless Studio LLC](https://appshunter.io/developer/1228312508) |

## What reviewers say

### Interval Timer □ HIIT Timer

[App page](https://appshunter.io/ios/app/interval-timer-hiit-timer/id1124297113)

Create custom workout timers with adjustable intervals for exercise and rest.  Track your progress with detailed history and statistics, and repeat past workouts easily.  Enjoy audio cues without interrupting your music.

**Highlights:** Customizable intervals, Workout and rest timers, Voice or beep guides, Background audio support, Workout history and statistics, Repeat previous workouts

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Pass | $1.99 | per month |
| Premium Pass | $2.99 | per month |
| Lifetime Pass | $14.99 | one-time |
| Lifetime Pass | $19.99 | one-time |
| Premium Forever Promo | $29.99 | one-time |

**What reviewers like**

- 🚀 Simple and easy to use
- 👍 Customizable settings
- 🚀 Intuitive interface
- 🚀 Effective for HIIT workouts
- 👍 Helpful voice prompts

**What reviewers complain about**

- 🔒 Requires subscription after limited free use
- 🐛 Music volume issues with voice prompts
- 🐛 Inconsistent behavior when switching apps
- 🐛 Lack of final workout notification

**Reported bugs**

- Timer not always accurate
- Favorites/saved workouts feature not working
- Inconsistent behavior when pausing/resuming

**Requested features**

- Ability to save and name custom workouts
- More flexibility in exercise/rest time settings
- Option to adjust volume of voice prompts


### HIIT Interval Timer | Cero

[App page](https://appshunter.io/ios/app/hiit-interval-timer-cero/id1256319392)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cero Pro | $3.99 | one-time |

**What reviewers like**

- 👍 Simple and straightforward
- 👍 Very practical and customizable
- 👍 Great for HIIT and Tabata
- 👍 Clear design and easy to use
- 👍 Good value, no subscription

**What reviewers complain about**

- 🔋 Drains battery
- 🎶 Music playback interrupted
- ⚠️ Ads interrupt timers
- 🔊 Weak or non-functional sound/haptics
- 🔄 Forced updates

**Reported bugs**

- 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**

- 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


## Frequently asked questions

### Is Interval Timer □ HIIT Timer free?

Interval Timer □ HIIT Timer is free to download, with in-app purchases available.

### Is HIIT Interval Timer | Cero free?

HIIT Interval Timer | Cero is free to download, with in-app purchases available.

### Which has better reviews, Interval Timer □ HIIT Timer or HIIT Interval Timer | Cero?

Interval Timer □ HIIT Timer is rated higher. Interval Timer □ HIIT Timer averages 4.8 out of 5 from 86K ratings, while HIIT Interval Timer | Cero averages 4.7 from 435 ratings.

### Do Interval Timer □ HIIT Timer or HIIT Interval Timer | Cero have ads?

HIIT Interval Timer | Cero shows ads; Interval Timer □ HIIT Timer does not.

### Which is updated more often, Interval Timer □ HIIT Timer or HIIT Interval Timer | Cero?

Interval Timer □ HIIT Timer ships an update every 5 weeks, and HIIT Interval Timer | Cero every 2 weeks. Most recently, Interval Timer □ HIIT Timer was updated on September 24, 2026 and HIIT Interval Timer | Cero on September 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*