# RK fit vs BBLJ

The clearest difference is in-app purchases: BBLJ at none against RK fit's 4. BBLJ also leads on update cadence (every 6 weeks vs every 7 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. RK fit sells 4 one-off in-app purchases. BBLJ asks for nothing beyond the download.

RK fit ships an update every 7 months, BBLJ every 6 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | RK fit | BBLJ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 92.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 76 MB | 126 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Romane Pertolas](https://appshunter.io/developer/1781201870) | [JOSEPH LUCILE](https://appshunter.io/developer/1804405554) |

## What reviewers say

### RK fit

[App page](https://appshunter.io/ios/app/rk-fit/id6738574406)

This fitness app offers biomechanically-based training programs tailored to your goals, with exercise libraries, eBooks, and scientific articles. Track progress, discover exercise variations, and access nutrition guidance with recipes and a calorie calculator to support muscle gain, fat loss, or overall fitness.

**Highlights:** Biomechanically-based training programs, Exercise library with variations, Progress tracking for strength gains, Nutrition guidance with recipes, Calorie and portion calculator, Scientific articles and eBooks

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pack d'un programme | $39.00 | one-time |
| Pack de deux programmes | $69.00 | one-time |
| Pack de trois programmes | $99.99 | one-time |
| Pack de quatre programmes | $129.99 | one-time |


### BBLJ

[App page](https://appshunter.io/ios/app/bblj/id6743767745)

Achieve your fitness goals with personalized workout programs, custom nutrition plans, and remote coaching. Track your progress by connecting to Apple HealthKit for a comprehensive view of your physical transformation.

**Highlights:** Personalized sports programs, Custom nutrition plans, Remote private coaching, In-person session booking, Apple HealthKit integration, Progress tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is RK fit free?

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

### Is BBLJ free?

BBLJ is free to download, with no in-app purchases.

### Do RK fit or BBLJ have ads?

Neither RK fit nor BBLJ shows ads.

### Which is updated more often, RK fit or BBLJ?

RK fit ships an update every 7 months, and BBLJ every 6 weeks. Most recently, RK fit was updated on October 30, 2026 and BBLJ 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.*