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LineGuard VPN is a privacy-focused VPN app designed to help users create a secure network connection and understand connection quality clearly.

Unlike a basic one-tap VPN, LineGuard includes connection health monitoring. It evaluates latency, download speed, stability, probe failures, packet loss and reconnection events to show a clear line health score.

Users can choose automatic recommendation, speed priority, stability priority or manual line selection. The app displays recommended line information and connection suggestions so users can make an informed choice.

LineGuard also includes a Connection Monitor page for network diagnostics after connection. When the primary line is unstable, the app can use backup line switching, weak-network compatibility and the last known working configuration to improve connection recovery.

Privacy and transparency:
- No personal account is required; users can use a guest identity.
- The app does not collect browsing history, website content, account passwords or personal communications.
- Diagnostic logs are redacted, and detailed logs are only attached when the user chooses to submit feedback.
- Users can delete the local guest identity and remove or anonymize related connection preferences and diagnostic data.

Main features:
- VPN connection with managed line selection
- Line health score and connection diagnostics
- Auto recommendation, speed priority, stability priority and manual line modes
- Backup line switching and weak-network compatibility
- Guest identity with account deletion option
- Privacy policy and support access inside the app