# Protelion VPN vs PDF Editor Studio

The clearest difference is price: Protelion VPN at Free against PDF Editor Studio's $0.99. PDF Editor Studio's advantage is update cadence (every 3 weeks vs every 4 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Protelion VPN is free to download; PDF Editor Studio costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Protelion VPN ships an update every 4 months, PDF Editor Studio every 3 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Protelion VPN | PDF Editor Studio |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/protelion-vpn/id1118874627/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 44 MB | 27 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Protelion GmbH](https://appshunter.io/developer/1118874626) | [StudyBridge LLC](https://appshunter.io/developer/1830101876) |

## What reviewers say

### Protelion VPN

[App page](https://appshunter.io/ios/app/protelion-vpn/id1118874627)

Securely connect your iOS device to a VPN using a proprietary data protocol. It offers symmetric encryption for data packets and requires encryption keys from your administrator to establish a connection.

**Highlights:** Secure VPN connection, Proprietary data protocol, Symmetric encryption, Session-less approach, UDP/TCP support

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Editor Studio

[App page](https://appshunter.io/ios/app/pdf-editor-studio/id6759298506)

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

**In-app purchases:** none


## Frequently asked questions

### Is Protelion VPN free?

Protelion VPN is free to download, with no in-app purchases.

### Is PDF Editor Studio free?

PDF Editor Studio costs $0.99, with no in-app purchases.

### Do Protelion VPN or PDF Editor Studio have ads?

Neither Protelion VPN nor PDF Editor Studio shows ads.

### Which is updated more often, Protelion VPN or PDF Editor Studio?

Protelion VPN ships an update every 4 months, and PDF Editor Studio every 3 weeks. Most recently, Protelion VPN was updated on October 24, 2026 and PDF Editor Studio on October 13, 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.*