Cross-Platform Mobile App Build -- 2

I want to turn an existing concept into a fully working mobile application released on both the App Store and Google Play. The scope covers everything from initial technical planning through design, coding, testing, and store submission, with clean, well-documented source code handed over at the end... (Budget: ₹400 - ₹750 INR, Jobs: Android, Flutter, iOS Development, iPhone, Mobile App Development, React Native, Swift, User Interface / IA)