# PDF Protector vs Roman Numerals Generator SDG

The clearest difference is in-app purchases: Roman Numerals Generator SDG at none against PDF Protector's 3. Roman Numerals Generator SDG also leads on review sentiment (100% vs 71%) and iOS requirement (11.0 vs 18.0). PDF Protector's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 12 months). On price and device support there is nothing between them.

Both are free to download. PDF Protector sells 3 one-off in-app purchases. Roman Numerals Generator SDG asks for nothing beyond the download.

PDF Protector ships an update every 3 weeks, Roman Numerals Generator SDG every 12 months. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | PDF Protector | Roman Numerals Generator SDG |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/pdf-protector/id566631581/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 71.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 12 months |
| Monetization | **Free** | Ad-supported |
| Size | 9 MB | 12 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Witt](https://appshunter.io/developer/1438848391) | [SDG CODE DOO NIS](https://appshunter.io/developer/1343251532) |

## What reviewers say

### PDF Protector

[App page](https://appshunter.io/ios/app/pdf-protector/id566631581)

Secure your PDF documents with robust password protection and encryption. This tool allows you to restrict printing, copying, and content extraction, while also enabling decryption of protected files. Protect sensitive information quickly and reliably.

**Highlights:** Encrypt PDF files with password protection, Restrict printing and copying, Decrypt protected PDFs, Create reusable security profiles, Protect multiple files at once, Fast and intuitive interface

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version for iPhone & iPad | $4.99 | one-time |
| Full Version for Mac | $9.99 | one-time |
| Full Version for All Devices | $12.99 | one-time |


### Roman Numerals Generator SDG

[App page](https://appshunter.io/ios/app/roman-numerals-generator-sdg/id6741525500)

Easily convert decimal numbers to Roman numerals and Roman numerals back to decimal. This utility app simplifies switching between numeral systems with a few taps.

**Highlights:** Decimal to Roman numeral conversion, Roman numeral to decimal conversion, Simple interface, Supports multiple numeral systems

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Protector free?

PDF Protector is free to download, with in-app purchases available.

### Is Roman Numerals Generator SDG free?

Roman Numerals Generator SDG is free to download, with no in-app purchases.

### Do PDF Protector or Roman Numerals Generator SDG have ads?

Roman Numerals Generator SDG shows ads; PDF Protector does not.

### Which is updated more often, PDF Protector or Roman Numerals Generator SDG?

PDF Protector ships an update every 3 weeks, and Roman Numerals Generator SDG every 12 months. Most recently, PDF Protector was updated on October 17, 2026 and Roman Numerals Generator SDG on October 10, 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.*