# HIIT timer chronometer gym vs HIIT Interval Timer | Cero

The clearest difference is in-app purchases: HIIT timer chronometer gym at none against HIIT Interval Timer | Cero's 2. HIIT timer chronometer gym also leads on iOS requirement (14.0 vs 16.0). HIIT Interval Timer | Cero's advantage is update cadence (every 3 days vs every 7 months) and review sentiment (75% vs 53%). On price, ads and device support there is nothing between them.

Both are free to download. HIIT Interval Timer | Cero sells 2 in-app purchases, starting at $2.99 per month. HIIT timer chronometer gym asks for nothing beyond the download.

HIIT Interval Timer | Cero holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: HIIT Interval Timer | Cero has 435 ratings behind it against 37, so its average is the more settled of the two. Written reviews point the same way: 53% of HIIT timer chronometer gym's written reviews are positive against 75% of HIIT Interval Timer | Cero's.

HIIT timer chronometer gym ships an update every 7 months, HIIT Interval Timer | Cero every 3 days. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | HIIT timer chronometer gym | HIIT Interval Timer | Cero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (37 ratings)](https://appshunter.io/ios/app/hiit-timer-chronometer-gym/id1086940926/reviews) | **[4.7 (435 ratings)](https://appshunter.io/ios/app/hiit-interval-timer-cero/id1256319392/reviews)** |
| Number of ratings | 37 | **435** |
| Positive reviews | 52.9% of reviews | **74.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 7 months | **Every 3 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 7 MB | 42 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | +4 | 4+ |
| Developer | [Mireia Lluch Ortola](https://appshunter.io/developer/1003230042) | [Flawless Studio LLC](https://appshunter.io/developer/1228312508) |

## What reviewers say

### HIIT timer chronometer gym

[App page](https://appshunter.io/ios/app/hiit-timer-chronometer-gym/id1086940926)

This interval timer helps you manage work and rest periods for various fitness activities like HIIT, tabata, and strength training. It offers customizable settings for timers, repetitions, and series, with audible and visual cues to guide your workouts.

**Highlights:** Programmable timers, Customizable time settings, Customizable series and repetitions, Audible and visual alerts, Pause and resume functionality, Speaking coach

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Effective for HIIT workouts
- 💰 Free to use
- 👌 Good for basic timing needs
- 🗣️ Voice control is superb

**What reviewers complain about**

-  anúncios Annoying ads
- 🔇 No sound issues
- 🔒 Screen locks and app stops
- 👎 Unstable, crashes during workouts
- 🎛️ Limited customization options

**Reported bugs**

- Screen goes to sleep and locks
- Screen turns off after last update
- No sound
- App disappears during workouts
- Timer stops when screen is locked

**Requested features**

- Ability to save workout settings
- Option to create rest periods for stretching
- Specify series vs. exercises better
- Basic customization would be useful
- Landscape mode


### 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 (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cero Pro Monthly | $2.99 | per month |
| Cero Pro | $14.99 | 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 HIIT timer chronometer gym free?

HIIT timer chronometer gym is free to download, with no in-app purchases.

### Is HIIT Interval Timer | Cero free?

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

### Which has better reviews, HIIT timer chronometer gym or HIIT Interval Timer | Cero?

HIIT Interval Timer | Cero is rated higher. HIIT timer chronometer gym averages 4.4 out of 5 from 37 ratings, while HIIT Interval Timer | Cero averages 4.7 from 435 ratings.

### Do HIIT timer chronometer gym or HIIT Interval Timer | Cero have ads?

Both HIIT timer chronometer gym and HIIT Interval Timer | Cero show ads.

### Which is updated more often, HIIT timer chronometer gym or HIIT Interval Timer | Cero?

HIIT timer chronometer gym ships an update every 7 months, and HIIT Interval Timer | Cero every 3 days. Most recently, HIIT timer chronometer gym was updated on October 18, 2026 and HIIT Interval Timer | Cero on October 16, 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.*