# MRX Physics vs A

The clearest difference is in-app purchases: MRX Physics at none against A's 1. MRX Physics also leads on iOS requirement (15.6 vs 18.0). A's advantage is update cadence (every 2 weeks vs every 26 months). On price, ads and device support there is nothing between them.

Both are free to download. A sells 1 one-off in-app purchase. MRX Physics asks for nothing beyond the download.

MRX Physics ships an update every 26 months, A every 2 weeks. The most recent releases landed on September 18, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | MRX Physics | A |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 2 weeks** |
| Size | 282 MB | 271 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Ahmed Radwan](https://appshunter.io/developer/1586606710) | [Ogumo Co., Ltd.](https://appshunter.io/developer/1289277557) |

## What reviewers say

### MRX Physics

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

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

**In-app purchases:** none


### A

[App page](https://appshunter.io/ios/app/a-physics-mechanics/id6670272249)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide ads | $5.99 | one-time |


## Frequently asked questions

### Is MRX Physics free?

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

### Is A free?

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

### Do MRX Physics or A have ads?

Neither MRX Physics nor A shows ads.

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

MRX Physics ships an update every 26 months, and A every 2 weeks. Most recently, MRX Physics was updated on September 18, 2026 and A on September 14, 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.*