# QR passcode validator vs DWG Viewer

The clearest difference is in-app purchases: QR passcode validator at none against DWG Viewer's 2. QR passcode validator also leads on iOS requirement (10.0 vs 15.0). DWG Viewer's advantage is update cadence (every 3 days vs every 16 months). On price, ads and device support there is nothing between them.

Both are free to download. DWG Viewer sells 2 in-app purchases, starting at $2.99 per 7 days. QR passcode validator asks for nothing beyond the download.

QR passcode validator ships an update every 16 months, DWG Viewer every 3 days. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | QR passcode validator | DWG Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 days** |
| Size | 3 MB | 40 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Mercury Development, LLC](https://appshunter.io/developer/305978040) | [Rush Tools LLC](https://appshunter.io/developer/1896773547) |

## What reviewers say

### QR passcode validator

[App page](https://appshunter.io/ios/app/qr-passcode-validator/id1188686767)

**In-app purchases:** none


### DWG Viewer

[App page](https://appshunter.io/ios/app/dwg-viewer-cad-drawing-reader/id6815304762)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DWG Viewer Pro | $2.99 | per 7 days |
| DWG Viewer Pro | $14.99 | per year |


## Frequently asked questions

### Is QR passcode validator free?

QR passcode validator is free to download, with no in-app purchases.

### Is DWG Viewer free?

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

### Do QR passcode validator or DWG Viewer have ads?

Neither QR passcode validator nor DWG Viewer shows ads.

### Which is updated more often, QR passcode validator or DWG Viewer?

QR passcode validator ships an update every 16 months, and DWG Viewer every 3 days. Most recently, QR passcode validator was updated on October 13, 2026 and DWG Viewer 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.*