# HIIT Interval Timer | Cero vs Diet Score Tracker

The clearest difference is ads: Diet Score Tracker at none against HIIT Interval Timer | Cero's shown. Diet Score Tracker also leads on rating (5.0 vs 4.7). HIIT Interval Timer | Cero's advantage is ratings volume (435 vs 1) and device support (3 vs 1). On price, update cadence, in-app purchases and monetization model 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 Diet Score Tracker sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Diet Score Tracker holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: HIIT Interval Timer | Cero has 435 ratings behind it against 1, so its average is the more settled of the two.

HIIT Interval Timer | Cero ships an update every 3 days, Diet Score Tracker every 4 days. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | HIIT Interval Timer | Cero | Diet Score Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (435 ratings)](https://appshunter.io/ios/app/hiit-interval-timer-cero/id1256319392/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/diet-score-tracker-adherence/id6798776824/reviews)** |
| Number of ratings | **435** | 1 |
| Positive reviews | 74.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 42 MB | 127 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Flawless Studio LLC](https://appshunter.io/developer/1228312508) | [Klodian Dhana](https://appshunter.io/developer/6784377272) |

## 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


### Diet Score Tracker

[App page](https://appshunter.io/ios/app/diet-score-tracker-adherence/id6798776824)

This app scores your last seven days of meals against four popular dietary patterns. Simply photograph a plate, confirm the dish, and receive scores based on MIND, DASH, Mediterranean, and HEI-2020 guidelines. All data is processed and stored locally on your device.

**Highlights:** Photograph meals for scoring, Scores against 4 dietary patterns, Local data processing and storage, No grams or guessing required, Export log and settings, Single purchase, no subscription

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $9.99 | 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 Diet Score Tracker free?

Diet Score Tracker is free to download, with in-app purchases available.

### Which has better reviews, HIIT Interval Timer | Cero or Diet Score Tracker?

Diet Score Tracker is rated higher. HIIT Interval Timer | Cero averages 4.7 out of 5 from 435 ratings, while Diet Score Tracker averages 5.0 from 1 ratings.

### Do HIIT Interval Timer | Cero or Diet Score Tracker have ads?

HIIT Interval Timer | Cero shows ads; Diet Score Tracker does not.

### Which is updated more often, HIIT Interval Timer | Cero or Diet Score Tracker?

HIIT Interval Timer | Cero ships an update every 3 days, and Diet Score Tracker every 4 days. Most recently, HIIT Interval Timer | Cero was updated on October 16, 2026 and Diet Score Tracker on October 7, 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.*