# Interval Timer for HIIT | Cero vs HC HIIT Interval Timer

The clearest difference is rating: Interval Timer for HIIT | Cero at 4.7 against HC HIIT Interval Timer's 4.2. Interval Timer for HIIT | Cero also leads on update cadence (every 3 days vs every 21 months) and ratings volume (438 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. Interval Timer for HIIT | Cero sells 2 in-app purchases, starting at $2.99 per month. HC HIIT Interval Timer asks for nothing beyond the download.

Interval Timer for HIIT | Cero holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Interval Timer for HIIT | Cero has 438 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 75% of Interval Timer for HIIT | 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.

Interval Timer for HIIT | Cero ships an update every 3 days, HC HIIT Interval Timer every 21 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Interval Timer for HIIT | Cero | HC HIIT Interval Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (438 ratings)](https://appshunter.io/ios/app/interval-timer-for-hiit-cero/id1256319392/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/hc-hiit-interval-timer/id1501179862/reviews) |
| Number of ratings | **438** | 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 | 45 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

### Interval Timer for HIIT | Cero

[App page](https://appshunter.io/ios/app/interval-timer-for-hiit-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, iPhone Duo 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 Interval Timer for HIIT | Cero free?

Interval Timer for HIIT | 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, Interval Timer for HIIT | Cero or HC HIIT Interval Timer?

Interval Timer for HIIT | Cero is rated higher. Interval Timer for HIIT | Cero averages 4.7 out of 5 from 438 ratings, while HC HIIT Interval Timer averages 4.2 from 5 ratings.

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

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

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

Interval Timer for HIIT | Cero ships an update every 3 days, and HC HIIT Interval Timer every 21 months. Most recently, Interval Timer for HIIT | Cero was updated on November 2, 2026 and HC HIIT Interval Timer on November 3, 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.*