Privacy Test Utility

A minimal Android application for testing privacy methods including VPN logic, DNS resolution changes, and Mock Location detection.

Features

• WireGuard VPN: Integration for using WireGuard tunnels. Supports Mock mode for logic testing without a server.
• DNS Changer: Configure DNS settings (simulated or via VPN).
• Mock Location: Helper to push mock GPS data and visualize Real vs Mock signals.
• Self-Test: Built-in diagnostic tool to generate a JSON report of current privacy states.

Setup & Usage

1. VPN & IP

• Toggle VPN: Use the switch on the main screen to enable the VPN service.
• Import Config: Click "Import Config" to load a valid WireGuard .conf file.
  • Note: If no config is imported, the app uses Mock Mode (Connected state simulated, no real traffic routing).
• Status: View the current internal IP and Country (Mock or Real).

2. DNS

• Select Provider: Choose from Cloudflare, Google, NextDNS, or Custom.
• Apply via VPN: Toggle if the DNS should be applied to the VPN tunnel.

3. Mock Location

• Enable Developer Options: Go to Settings > About Phone > Tap "Build Number" 7 times.
• Select Mock App: In Developer Options, find "Select mock location app" and choose "Privacy Test Utility".
• Usage: Toggle "Mock Location Helper" in the app.
  • The app will attempt to push a mock location (Paris, France).
  • The status table will show "Real" (if detectable) and "Mock" coordinates side-by-side.

4. Self-Test

• Click "Run Self-Test" to generate a JSON report.
• The report verifies:
  • VPN Connection State
  • Location Provider Status
  • DNS Simulation results

Development

• Build: ./gradlew assembleDebug
• Architecture:
  • MyVpnService: Handles VpnService lifecycle and Mock logic.
  • LocationHelper: Manages FusedLocationProvider and Mock injections.
  • AppRepository: Centralizes state for UI.

Limitations

• System Timezone: Cannot be changed without root.
• SIM Country: Read-only without root/Magisk.
• Real GPS: Might be unavailable if the system fully replaces the provider when Mock is active.