# QR Code vs lock pdf | unlock pdf expert

The clearest difference is device support: QR Code at 3 against lock pdf | unlock pdf expert's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | QR Code | lock pdf | unlock pdf expert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 21 MB | 1 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [OENG Mengthong](https://appshunter.io/developer/1581219910) | [逢信 谭](https://appshunter.io/developer/1825263250) |

## What reviewers say

### QR Code

[App page](https://appshunter.io/ios/app/qr-code-qr-everything/id6746709839)

**Features:** macOS Compatibility

**In-app purchases:** none


### lock pdf | unlock pdf expert

[App page](https://appshunter.io/ios/app/lock-pdf-unlock-pdf-expert/id6749227930)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is QR Code free?

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

### Is lock pdf | unlock pdf expert free?

lock pdf | unlock pdf expert is free to download, with no in-app purchases.

### Do QR Code or lock pdf | unlock pdf expert have ads?

Neither QR Code nor lock pdf | unlock pdf expert shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*