# PDF Secure, Lock PDF password vs PDF Studio(Pro)

The clearest difference is price: PDF Secure, Lock PDF password at Free against PDF Studio(Pro)'s $2.99. PDF Studio(Pro)'s advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 15.0). On ads and device support there is nothing between them.

PDF Secure, Lock PDF password is free to download; PDF Studio(Pro) costs $2.99 up front. PDF Secure, Lock PDF password sells 3 in-app purchases, starting at $1.99 per 7 days. PDF Studio(Pro) asks for nothing beyond the download.

## The numbers

| Metric | PDF Secure, Lock PDF password | PDF Studio(Pro) |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Size | 4 MB | 42 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Oufqir](https://appshunter.io/developer/1750312649) | [Hrishi Suthar](https://appshunter.io/developer/1660005858) |

## 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 |


### PDF Studio(Pro)

[App page](https://appshunter.io/ios/app/pdf-studiopro/id6757748809)

**Features:** macOS Compatibility

**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 PDF Studio(Pro) free?

PDF Studio(Pro) costs $2.99, with no in-app purchases.

### Do PDF Secure, Lock PDF password or PDF Studio(Pro) have ads?

Neither PDF Secure, Lock PDF password nor PDF Studio(Pro) shows ads.

---

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