Custom Mobile App Development Needed

I need a capable developer who can take my concept and turn it into a fully-functioning mobile application. While I indicated “ऐप विकास” as the core service, I have not yet locked down whether the build should target Android, iOS, or a single code-base solution such as Flutter or React Native... (Budget: ₹12500 - ₹37500 INR, Jobs: Android, App Design, Flutter, Graphic Design, Mobile App Development, React Native, UI / User Interface, User Interface / IA)