# OrthoMaster vs ARM

The clearest difference is update cadence: OrthoMaster at every 6 weeks against ARM's every 11 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.

OrthoMaster ships an update every 6 weeks, ARM every 11 months. The most recent releases landed on September 8, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | OrthoMaster | ARM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 11 months |
| Size | 61 MB | 17 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [OrthoMaster](https://appshunter.io/developer/1643479839) | [Mohamed Bouziane](https://appshunter.io/developer/1210834741) |

## What reviewers say

### OrthoMaster

[App page](https://appshunter.io/ios/app/orthomaster/id1644851864)

**Features:** Apple Wallet

**In-app purchases:** none


### ARM

[App page](https://appshunter.io/ios/app/arm/id6445811864)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OrthoMaster free?

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

### Is ARM free?

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

### Do OrthoMaster or ARM have ads?

Neither OrthoMaster nor ARM shows ads.

### Which is updated more often, OrthoMaster or ARM?

OrthoMaster ships an update every 6 weeks, and ARM every 11 months. Most recently, OrthoMaster was updated on September 8, 2026 and ARM on October 6, 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.*