NAI VPN

A Flutter app that acts like a VPN client using HTTP proxies from a remote list. Premium UI inspired by top VPN apps.

Features

• Fetch proxies from https://proxies.typegpt.net/ips.txt
• Auto refresh every 30 minutes
• Server list with flags, names, IP, and latency
• Connect/Disconnect flow with animated button
• Session timer and basic data stats (stubbed)
• Settings: Auto-connect, Kill switch (stub), Split tunneling (stub)

Tech

• Flutter + Dart
• Riverpod for state management
• http for networking
• country_flags and google_fonts for UI polish

Getting Started

1. Install Flutter (3.19+ recommended) and Dart SDK.
2. From the project root, fetch packages and run:

flutter pub get
flutter run

Platform integration (to do)

• Android (system-wide IP change):

  1. Download Leaf native libs from https://github.com/eycorsican/leaf/releases (v0.11.0+).
  2. Copy the .so files per ABI to:
     • android/app/src/main/jniLibs/arm64-v8a/
     • android/app/src/main/jniLibs/armeabi-v7a/
     • android/app/src/main/jniLibs/x86_64/
  3. Build and run, allow VPN permission. If you see a notification "Native tunnel not found. Add jniLibs.", the libs are missing.
  4. After libs are present, the service will route traffic through the selected HTTP proxy (Leaf tun2socks). Split tunneling and Kill switch can then be enabled.

• iOS: Requires NetworkExtension (NEPacketTunnelProvider) with Apple Developer entitlements.

Until the native libs are added, the app uses a stub tunnel; UI/notifications/speed tests work but system IP won’t change yet.

Notes

• The app enriches each proxy with country info via ipapi.co and measures TCP connect latency to rank servers.
• Be respectful of API rate limits in production; add caching/backoff.