# HIIT Interval Timer | Cero vs Workout Timer Interval & HIIT

The clearest difference is ads: Workout Timer Interval & HIIT at none against HIIT Interval Timer | Cero's shown. HIIT Interval Timer | Cero's advantage is update cadence (every 3 days vs fortnightly) and review sentiment (75% vs 53%). On price, in-app purchases, monetization model 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 and Workout Timer Interval & HIIT sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

HIIT Interval Timer | Cero holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 435 and 145 respectively. Written reviews point the same way: 75% of HIIT Interval Timer | Cero's written reviews are positive against 53% of Workout Timer Interval & HIIT's.

HIIT Interval Timer | Cero ships an update every 3 days, Workout Timer Interval & HIIT fortnightly. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | HIIT Interval Timer | Cero | Workout Timer Interval & HIIT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (435 ratings)](https://appshunter.io/ios/app/hiit-interval-timer-cero/id1256319392/reviews)** | [4.5 (145 ratings)](https://appshunter.io/ios/app/workout-timer-interval-and-hiit/id1669997130/reviews) |
| Number of ratings | **435** | 145 |
| Positive reviews | **74.6% of reviews** | 53.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 42 MB | 29 MB |
| Requires iOS | **16.0** | 16.1 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Flawless Studio LLC](https://appshunter.io/developer/1228312508) | [Simon Jansen](https://appshunter.io/developer/1669997132) |

## 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


### Workout Timer Interval & HIIT

[App page](https://appshunter.io/ios/app/workout-timer-interval-and-hiit/id1669997130)

This app offers customizable interval timers for various training styles like HIIT, Tabata, and Crossfit. Track your progress, enjoy background music, and switch between light and dark modes to enhance your fitness routine.

**Highlights:** Customizable interval timers, Supports HIIT, Tabata, WOD, Crossfit, EMOM, AMRAP, Historical workout tracking, Background music playback, Light and dark mode themes, Intuitive interface

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $2.99 | per month |
| Premium Yearly | $14.99 | per year |
| Premium | $29.99 | one-time |


## Frequently asked questions

### Is HIIT Interval Timer | Cero free?

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

### Is Workout Timer Interval & HIIT free?

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

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

HIIT Interval Timer | Cero is rated higher. HIIT Interval Timer | Cero averages 4.7 out of 5 from 435 ratings, while Workout Timer Interval & HIIT averages 4.5 from 145 ratings.

### Do HIIT Interval Timer | Cero or Workout Timer Interval & HIIT have ads?

HIIT Interval Timer | Cero shows ads; Workout Timer Interval & HIIT does not.

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

HIIT Interval Timer | Cero ships an update every 3 days, and Workout Timer Interval & HIIT fortnightly. Most recently, HIIT Interval Timer | Cero was updated on October 16, 2026 and Workout Timer Interval & HIIT on October 13, 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.*