Android VPN App Development in Flutter -- 2

Hi, I want to develop a professional, production-ready Free VPN App for Android using Flutter. I already have the UI structure, AdMob IDs, and backend API details ready. Please review my requirements and provide a milestone-based quote and timeline: ### CORE FEATURES REQUIRED: 1. No Auth/Login: The app should be instant-access (No sign-in/sign-up, no subscriptions). 2. Material 3 UI: Modern, clean layout with smooth animations. Must support Light & Dark themes. 3. Backend (VPN Gate API): Fetch free VPN servers dynamically from "[login to view URL]". Parse the CSV data, extract country names/flags, ping, speed, and decode the Base64 OpenVPN configuration. 4. Core VPN Service: Implement stable connection logic using Android VpnService API (OpenVPN or WireGuard protocol) with DNS Leak Protection and an optional Kill Switch toggle. 5. In-App Updates: Integrate the Google Play Core SDK for "In-App Updates" (Flexible and Immediate updates support) so users can update the app without leaving it. 6. Settings Screen: Language selector (English, Hindi, etc.), Theme toggle, Auto-connect on start, and Clear cache option. ### MONETIZATION (Google AdMob Integration): I have valid Ad Unit IDs. You need to integrate: - App Open Ad (On launch) - Banner Ad (Bottom of the main screen) - Interstitial Ad (Triggered intelligently on connect/disconnect actions) - Native Ad (Embedded beautifully inside the Server List) - Rewarded Ad (To unlock specific premium/high-speed servers) ### WHAT I EXPECT FROM YOU: - Clean, structured Flutter code (Preferably using Riverpod or Provider for State Management). - Proper documentation on how to set up the keystore and release the APK/AAB. - Assistance/Guidance during the Google Play Store publishing process. Please let me know if you have experience with VPN Service integration and share your portfolio of similar apps. Looking forward to your proposal!

Project ID: 40560876