# PDF Secure, Lock PDF password vs Password Strength Test

The clearest difference is in-app purchases: Password Strength Test at none against PDF Secure, Lock PDF password's 3. PDF Secure, Lock PDF password's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. PDF Secure, Lock PDF password sells 3 in-app purchases, starting at $1.99 per 7 days. Password Strength Test asks for nothing beyond the download.

## The numbers

| Metric | PDF Secure, Lock PDF password | Password Strength Test |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 4 months |
| Size | 4 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Oufqir](https://appshunter.io/developer/1750312649) | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) |

## What reviewers say

### PDF Secure, Lock PDF password

[App page](https://appshunter.io/ios/app/pdf-secure-lock-pdf-password/id6739538648)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $1.99 | per 7 days |
| Month | $3.99 | per month |
| Year | $29.99 | per year |


### Password Strength Test

[App page](https://appshunter.io/ios/app/password-strength-test/id6772260349)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Secure, Lock PDF password free?

PDF Secure, Lock PDF password is free to download, with in-app purchases available.

### Is Password Strength Test free?

Password Strength Test is free to download, with no in-app purchases.

### Do PDF Secure, Lock PDF password or Password Strength Test have ads?

Neither PDF Secure, Lock PDF password nor Password Strength Test 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.*