# PDF Converter Pro Master vs Secure Document & PDF Scan

The clearest difference is in-app purchases: PDF Converter Pro Master at none against Secure Document & PDF Scan's 4. PDF Converter Pro Master also leads on ads (none vs shown). Secure Document & PDF Scan's advantage is update cadence (weekly vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Secure Document & PDF Scan sells 4 in-app purchases, starting at $5.99 per 7 days. PDF Converter Pro Master asks for nothing beyond the download.

PDF Converter Pro Master ships an update every 2 months, Secure Document & PDF Scan weekly. The most recent releases landed on October 27, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | PDF Converter Pro Master | Secure Document & PDF Scan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Size | 11 MB | 24 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [HK YIHAN TECHNOLOGY CO., LIMITED](https://appshunter.io/developer/1761346342) | [ANTARES BUSINESS SUPPORT DOO](https://appshunter.io/developer/1831966165) |

## What reviewers say

### PDF Converter Pro Master

[App page](https://appshunter.io/ios/app/pdf-converter-pro-master/id6612030395)

**Features:** macOS Compatibility

**In-app purchases:** none


### Secure Document & PDF Scan

[App page](https://appshunter.io/ios/app/secure-document-and-pdf-scan/id6746461100)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $5.99 | per 7 days |
| Premium access | $9.99 | per 7 days |
| Premium access | $9.99 | per 7 days |
| Premium access | $34.99 | per month |


## Frequently asked questions

### Is PDF Converter Pro Master free?

PDF Converter Pro Master is free to download, with no in-app purchases.

### Is Secure Document & PDF Scan free?

Secure Document & PDF Scan is free to download, with in-app purchases available.

### Do PDF Converter Pro Master or Secure Document & PDF Scan have ads?

Secure Document & PDF Scan shows ads; PDF Converter Pro Master does not.

### Which is updated more often, PDF Converter Pro Master or Secure Document & PDF Scan?

PDF Converter Pro Master ships an update every 2 months, and Secure Document & PDF Scan weekly. Most recently, PDF Converter Pro Master was updated on October 27, 2026 and Secure Document & PDF Scan on September 23, 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.*