# Interval Timer for HIIT | Cero vs HIIT Interval Timer

The clearest difference is review sentiment: HIIT Interval Timer at 100% against Interval Timer for HIIT | Cero's 75%. Interval Timer for HIIT | Cero's advantage is update cadence (every 3 days vs fortnightly). On price, ads, in-app purchases and monetization model 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 and HIIT Interval Timer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Interval Timer for HIIT | Cero ships an update every 3 days, HIIT Interval Timer fortnightly. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Interval Timer for HIIT | Cero | HIIT Interval Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (437 ratings)](https://appshunter.io/ios/app/interval-timer-for-hiit-cero/id1256319392/reviews)** | — |
| Number of ratings | **437** | — |
| Positive reviews | 74.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 45 MB | 98 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Flawless Studio LLC](https://appshunter.io/developer/1228312508) | [tsyk-app](https://appshunter.io/developer/1586870924) |

## 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


### HIIT Interval Timer

[App page](https://appshunter.io/ios/app/hiit-interval-timer-tabata/id1586870922)

This app provides customizable interval timers for various workout styles like HIIT, Tabata, EMOM, and AMRAP. Track your progress, set weekly goals, and enjoy estimated calorie burn with shareable workout summaries. It offers a free version with core features and a Pro version for enhanced customization and an ad-free experience.

**Highlights:** Customizable interval timers, Multiple workout modes (HIIT, Tabata, EMOM, AMRAP), Weekly goal tracking, Estimated calorie burn, Workout sharing options, Sound and haptic cues, Customizable themes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HIIT Timer Pro | $4.99 | one-time |


## 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 HIIT Interval Timer free?

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

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

Both Interval Timer for HIIT | Cero and HIIT Interval Timer show ads.

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

Interval Timer for HIIT | Cero ships an update every 3 days, and HIIT Interval Timer fortnightly. Most recently, Interval Timer for HIIT | Cero was updated on October 29, 2026 and HIIT Interval Timer on October 30, 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.*