Cross Platform Doubt Clarification App

I’m building a mobile solution that lets muslim one post their doubts related to hadith and get real-time help from imam and alim. I need the complete application delivered for both iOS and Android, sharing a single codebase where possible to keep maintenance straightforward... (Budget: ₹1500 - ₹12500 INR, Jobs: Android, Flutter, iOS Development, iPhone, Mobile App Development, React Native, UI / User Interface, User Interface / IA)