# Smart QR Code Barcode Scanner vs Unit Converter

The clearest difference is in-app purchases: Smart QR Code Barcode Scanner at none against Unit Converter's 1. Smart QR Code Barcode Scanner also leads on ads (none vs shown) and iOS requirement (12.0 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Unit Converter sells 1 one-off in-app purchase. Smart QR Code Barcode Scanner asks for nothing beyond the download.

Smart QR Code Barcode Scanner ships an update fortnightly, Unit Converter monthly. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Smart QR Code Barcode Scanner | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Monthly |
| Size | 60 MB | 7 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [兆扬 张](https://appshunter.io/developer/1800601675) | [Yusuke Takeuchi](https://appshunter.io/developer/1103617788) |

## What reviewers say

### Smart QR Code Barcode Scanner

[App page](https://appshunter.io/ios/app/smart-qr-code-barcode-scanner/id6742935802)

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

**In-app purchases:** none


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-anything-fast/id6801741956)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Smart QR Code Barcode Scanner free?

Smart QR Code Barcode Scanner is free to download, with no in-app purchases.

### Is Unit Converter free?

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

### Do Smart QR Code Barcode Scanner or Unit Converter have ads?

Unit Converter shows ads; Smart QR Code Barcode Scanner does not.

### Which is updated more often, Smart QR Code Barcode Scanner or Unit Converter?

Smart QR Code Barcode Scanner ships an update fortnightly, and Unit Converter monthly. Most recently, Smart QR Code Barcode Scanner was updated on October 5, 2026 and Unit Converter on October 15, 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.*