Mysterium VPN: Fast & Secure Security & Privacy Scorecard

by UAB MN Technologijos · iOS

42
Overall trust score
Unsafe
87
Security
22
Privacy

Usage data and activity are collected and shared with multiple third parties. Users have limited options to opt out of this data collection. Information about network activity may be passed to external services beyond user control.

Best for

Casual browsing with a decentralized network

Avoid if

You rely on VPN to stay anonymous online

Findings

  • 0 critical
  • 4 high
  • 6 medium
  • 3 low
  • 6 info

1 issue identified across security and privacy analysis.

Top security issues

  • Ad Personalization and Ad User Data Enabled by Default Before Consent
  • Testing Frameworks Included in Production Binary
  • Google Ads On-Device Conversion Measurement in a VPN App

Top privacy issues

  • OneSignal Location Tracking in a Privacy-Focused VPN App
  • Privacy Manifest Declares Zero Collected Data Types Despite Extensive SDK Data Collection
  • Persistent Device Fingerprinting via flutter_udid

Full analysis

Package: com.mysteriumvpn
Scan Date: 2026-03-24

What This Means for You

Usage data and activity are collected and shared with multiple third parties. Users have limited options to opt out of this data collection. Information about network activity may be passed to external services beyond user control.

Recommendation: Use With Caution

Best For: Casual browsing with a decentralized network
Avoid If: Users rely on VPN to stay anonymous online

Key Findings

Data Security - 3 findings (2 low, 1 info)

Network Security - 4 findings (1 medium, 1 low, 2 info)

Code Safety - 0 findings

Privacy - 4 findings (2 high, 2 medium)

Privacy Concerns

What Data is Collected

The app collects data about network usage, connection behavior, and activity patterns during operation. This information is retained as part of the service's standard data practices.

Third-Party Data Sharing

The data the service collects about user activity is shared externally as part of its operation. Information about how users use the network may reach parties beyond the app itself, without clear opt-out options available.

Understanding the Scores

  • Security: 87/100
  • Privacy: 22/100
  • Data Security: 92/100
  • Network Security: 90/100
  • Code Safety: 83/100
  • Data Collection: 18/100
  • Data Sharing: 20/100
  • User Control: 30/100

Positive Security Features

  • Strong protections are in place for how user data is stored and handled within the app.
  • Network communications follow established security standards, reducing the risk of user data being intercepted in transit.
  • The app's code structure reflects consistent attention to safety in software design.

Areas for Improvement

  • The app gathers a broad range of data about user network activity, going beyond what is needed for basic operation, and provides limited ways for users to reduce this collection.
  • Information about user activity is shared with parties outside user control, which limits the privacy protections users would expect from a private networking tool.
  • Users' ability to manage, limit, or delete data collected about them is restricted, leaving users with little practical control over their own information.

About This Analysis

This scorecard is based on automated analysis of the app's published code and configuration as of the scan date. Scores and findings may change as the app is updated.

App Details

  • Package ID: com.mysteriumvpn
  • Scan Date: 2026-03-24

Versions & scan history

ScanDateOverall score
#6 (current) 42/100
#1 78/100