# Fitrix vs Bodyfat Calculator 3

The clearest difference is rating: Fitrix at 5.0 against Bodyfat Calculator 3's 3.7. Bodyfat Calculator 3's advantage is monetization model (free vs free with in-app purchases) and ratings volume (6 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Fitrix sells 3 in-app purchases, starting at $3.99 per month and Bodyfat Calculator 3 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Fitrix holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Bodyfat Calculator 3 has 6 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 12, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Fitrix | Bodyfat Calculator 3 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fitrix-interval-training/id6450888755/reviews)** | [3.7 (6 ratings)](https://appshunter.io/ios/app/bodyfat-calculator-3/id6473098021/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 4 MB | 46 MB |
| Requires iOS | 16.2 | **12.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mihail Kuznecovs](https://appshunter.io/developer/1467148695) | [Simon Burgess](https://appshunter.io/developer/960547111) |

## What reviewers say

### Fitrix

[App page](https://appshunter.io/ios/app/fitrix-interval-training/id6450888755)

Design your own high-intensity interval training routines with custom exercises and personalized intervals. Track your calorie burn and heart rate to stay motivated and achieve your fitness goals. Tailor your workouts to your unique needs and objectives.

**Highlights:** Custom HIIT workout creation, Personalized exercise intervals, Calorie tracking, Heart rate monitoring, Tailored fitness plans

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| Yearly Subscription | $12.99 | per year |
| Lifetime Purchase | $4.99 | one-time |


### Bodyfat Calculator 3

[App page](https://appshunter.io/ios/app/bodyfat-calculator-3/id6473098021)

Easily estimate your body fat percentage using simple measurements like waist circumference and weight. The app provides lean and fat mass values, BMI, and categorizes your body fat level. It supports multiple calculation methods and unit systems.

**Highlights:** Body fat percentage calculation, Lean and fat mass display, BMI and Waist to Height Ratio, Multiple calculation systems (RFM, YMCA, Army), Supports metric and imperial units, Real-time result updates, Multi-language support

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Fitrix free?

Fitrix is free to download, with in-app purchases available.

### Is Bodyfat Calculator 3 free?

Bodyfat Calculator 3 is free to download, with in-app purchases available.

### Which has better reviews, Fitrix or Bodyfat Calculator 3?

Fitrix is rated higher. Fitrix averages 5.0 out of 5 from 1 ratings, while Bodyfat Calculator 3 averages 3.7 from 6 ratings.

### Do Fitrix or Bodyfat Calculator 3 have ads?

Neither Fitrix nor Bodyfat Calculator 3 shows ads.

### Which is updated more often, Fitrix or Bodyfat Calculator 3?

Fitrix ships an update every 3 weeks, and Bodyfat Calculator 3 every 3 weeks. Most recently, Fitrix was updated on September 12, 2026 and Bodyfat Calculator 3 on September 21, 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.*