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... (Budget: ₹600 - ₹1500 INR, Jobs: Android, API Integration, App Design, Flutter, iPhone, Java, Mobile App Development, VPN)