Comparison

Protelion VPN vs PDF Editor Studio

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Protelion VPN

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
Read full description

Protelion VPN is a client application that allows iOS devices to securely connect to a Virtual Private Network (VPN) built using the Protelion VPN technology. Protelion VPN operates on a proprietary data protocol that can be used over any TCP/IP network, utilizing UDP or TCP. Notably, Protelion VPN employs a session-less approach and provides symmetric encryption to safeguard every VPN data packet payload. To establish a connection to the actual VPN, it is necessary to install encryption keys. Kindly contact your Protelion VPN administrator to obtain the encryption keys file.

About

PDF Editor Studio

Features
Read full description

PDF Editor Studio is a powerful yet simple PDF editing tool designed for fast and professional document modifications. Whether you need to add text, cover sensitive information with white boxes, or adjust content placement, this app makes editing PDFs effortless. KEY FEATURES • Add custom text with adjustable font size and color • Move and resize text elements freely • Insert white boxes to hide content • Undo recent changes • Export and share edited PDFs instantly • Smooth scrolling multi-page PDF support Perfect for students, professionals, freelancers, and anyone who needs quick PDF edits on the go. No complicated tools. No subscriptions. Just clean and simple PDF editing. Start editing your PDFs today.

Screenshots

Protelion VPN3 screens
PDF Editor Studio3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 7 level
Protelion VPN versus PDF Editor Studio: the parameters behind the verdict, then further details
ParameterProtelion VPNPDF Editor Studio
PriceFree — better$0.99
Rating4.3 (6 ratings) — better—
Number of ratings6 — better—
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size44 MB27 MB
Age rating4+4+
DeveloperProtelion GmbHStudyBridge LLC

In-app purchases

None

Protelion VPN

No in-app purchases

None

PDF Editor Studio

No in-app purchases

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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