# HIIT Interval Timer | Cero vs HC HIIT Interval Timer

The clearest difference is rating: HIIT Interval Timer | Cero at 4.7 against HC HIIT Interval Timer's 4.2. HIIT Interval Timer | Cero also leads on update cadence (every 3 days vs every 21 months) and ratings volume (435 vs 5). HC HIIT Interval Timer's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price and iOS requirement 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. HC HIIT Interval Timer asks for nothing beyond the download.

HIIT Interval Timer | Cero holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: HIIT Interval Timer | Cero has 435 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 75% of HIIT Interval Timer | Cero's written reviews are positive against 100% of HC HIIT Interval Timer's, so the app with the better star average is not the one people write more warmly about.

HIIT Interval Timer | Cero ships an update every 3 days, HC HIIT Interval Timer every 21 months. The most recent releases landed on October 16, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | HIIT Interval Timer | Cero | HC HIIT Interval Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (435 ratings)](https://appshunter.io/ios/app/hiit-interval-timer-cero/id1256319392/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/hc-hiit-interval-timer/id1501179862/reviews) |
| Number of ratings | **435** | 5 |
| Positive reviews | 74.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 21 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 42 MB | 2 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Flawless Studio LLC](https://appshunter.io/developer/1228312508) | [Dejan Dragic](https://appshunter.io/developer/1501179861) |

## What reviewers say

### 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


### HC HIIT Interval Timer

[App page](https://appshunter.io/ios/app/hc-hiit-interval-timer/id1501179862)

Create and manage custom interval training workouts with an integrated timer. Design workouts with specific actions, colors, names, and durations. Suitable for personal training or individual fitness routines.

**Highlights:** Create custom workouts, Integrated workout timer, Define actions with color, name, and duration, Use default workouts, Save and reuse workout routines

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HIIT Interval Timer | Cero free?

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

### Is HC HIIT Interval Timer free?

HC HIIT Interval Timer is free to download, with no in-app purchases.

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

HIIT Interval Timer | Cero is rated higher. HIIT Interval Timer | Cero averages 4.7 out of 5 from 435 ratings, while HC HIIT Interval Timer averages 4.2 from 5 ratings.

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

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

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

HIIT Interval Timer | Cero ships an update every 3 days, and HC HIIT Interval Timer every 21 months. Most recently, HIIT Interval Timer | Cero was updated on October 16, 2026 and HC HIIT Interval Timer on September 26, 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.*