# CMJ vs Scaff Inspector

The clearest difference is update cadence: Scaff Inspector at monthly against CMJ's every 22 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.

CMJ ships an update every 22 months, Scaff Inspector monthly. The most recent releases landed on October 11, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | CMJ | Scaff Inspector |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Monthly** |
| Size | 71 MB | 54 MB |
| Requires iOS | 14.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [THE COMPANY OF MASTER JEWELLERS LIMITED](https://appshunter.io/developer/1495401729) | [Scaffold Inspector Limited](https://appshunter.io/developer/1712102819) |

## What reviewers say

### CMJ

[App page](https://appshunter.io/ios/app/cmj/id1495401730)

**Features:** macOS Compatibility

**In-app purchases:** none


### Scaff Inspector

[App page](https://appshunter.io/ios/app/scaff-inspector/id6469515825)

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

**In-app purchases:** none


## Frequently asked questions

### Is CMJ free?

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

### Is Scaff Inspector free?

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

### Do CMJ or Scaff Inspector have ads?

Neither CMJ nor Scaff Inspector shows ads.

### Which is updated more often, CMJ or Scaff Inspector?

CMJ ships an update every 22 months, and Scaff Inspector monthly. Most recently, CMJ was updated on October 11, 2026 and Scaff Inspector on September 25, 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.*