# HIIT Interval Timer vs Interval Timer for HIIT | Cero

The clearest difference is rating: Interval Timer for HIIT | Cero at 4.7 against HIIT Interval Timer's 4.2. Interval Timer for HIIT | Cero also leads on update cadence (every 3 days vs every 5 months) and review sentiment (75% vs 53%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. HIIT Interval Timer sells 1 one-off in-app purchase and Interval Timer for HIIT | Cero sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Interval Timer for HIIT | Cero holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 103 and 437 respectively. Written reviews point the same way: 53% of HIIT Interval Timer's written reviews are positive against 75% of Interval Timer for HIIT | Cero's.

HIIT Interval Timer ships an update every 5 months, Interval Timer for HIIT | Cero every 3 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | HIIT Interval Timer | Interval Timer for HIIT | Cero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (103 ratings)](https://appshunter.io/ios/app/hiit-interval-timer/id980471893/reviews) | **[4.7 (437 ratings)](https://appshunter.io/ios/app/interval-timer-for-hiit-cero/id1256319392/reviews)** |
| Number of ratings | 103 | **437** |
| Positive reviews | 52.6% of reviews | **74.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 45 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Thang Nguyen](https://appshunter.io/developer/921360262) | [Flawless Studio LLC](https://appshunter.io/developer/1228312508) |

## What reviewers say

### HIIT Interval Timer

[App page](https://appshunter.io/ios/app/hiit-interval-timer/id980471893)

This app provides a flexible interval timer for high-intensity training. Customize workout cycles, rest periods, and receive color, voice, and sound navigation cues. It runs in the background and offers a built-in music player.

**Highlights:** Customizable interval and rest times, Background and screen-locked operation, Color, voice, and sound navigation, Built-in music player, Create and manage custom timers, Multiple themes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $4.99 | one-time |


### 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

**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 Interval Timer free?

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

### Is Interval Timer for HIIT | Cero free?

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

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

Interval Timer for HIIT | Cero is rated higher. HIIT Interval Timer averages 4.2 out of 5 from 103 ratings, while Interval Timer for HIIT | Cero averages 4.7 from 437 ratings.

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

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

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

HIIT Interval Timer ships an update every 5 months, and Interval Timer for HIIT | Cero every 3 days. Most recently, HIIT Interval Timer was updated on October 24, 2026 and Interval Timer for HIIT | Cero on October 24, 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.*