# JA vs MRX Physics

The clearest difference is update cadence: JA at every 3 weeks against MRX Physics's every 26 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

JA ships an update every 3 weeks, MRX Physics every 26 months. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | JA | MRX Physics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 26 months |
| Size | 63 MB | 282 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed ElHusseini](https://appshunter.io/developer/1565152479) | [Mohamed Ahmed Radwan](https://appshunter.io/developer/1586606710) |

## What reviewers say

### JA

[App page](https://appshunter.io/ios/app/ja-bio-academy/id6444244491)

**Features:** macOS Compatibility

**In-app purchases:** none


### MRX Physics

[App page](https://appshunter.io/ios/app/mrx-physics/id6590618732)

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

**In-app purchases:** none


## Frequently asked questions

### Is JA free?

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

### Is MRX Physics free?

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

### Do JA or MRX Physics have ads?

Neither JA nor MRX Physics shows ads.

### Which is updated more often, JA or MRX Physics?

JA ships an update every 3 weeks, and MRX Physics every 26 months. Most recently, JA was updated on October 15, 2026 and MRX Physics on October 5, 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.*