# PDF Guard(Pro) vs lock pdf | unlock pdf expert

The clearest difference is price: lock pdf | unlock pdf expert at Free against PDF Guard(Pro)'s $2.99. PDF Guard(Pro)'s advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On ads and in-app purchases there is nothing between them.

lock pdf | unlock pdf expert is free to download; PDF Guard(Pro) costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | PDF Guard(Pro) | lock pdf | unlock pdf expert |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | — |
| Size | 22 MB | 1 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Hrishi Suthar](https://appshunter.io/developer/1660005858) | [逢信 谭](https://appshunter.io/developer/1825263250) |

## What reviewers say

### PDF Guard(Pro)

[App page](https://appshunter.io/ios/app/pdf-guardpro/id6475249016)

**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 PDF Guard(Pro) free?

PDF Guard(Pro) costs $2.99, 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 PDF Guard(Pro) or lock pdf | unlock pdf expert have ads?

Neither PDF Guard(Pro) nor lock pdf | unlock pdf expert shows ads.

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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.*