Flutter Lab Booking App

I’m putting together a straightforward Flutter application that lets patients book diagnostic tests and track everything from one place. The same codebase must compile cleanly on both Android and iOS, so please keep platform-specific tweaks to a minimum... (Budget: ₹12500 - ₹37500 INR, Jobs: Android, Flutter, iOS Development, iPhone, Mobile App Development, Payment Gateway Integration, PHP, User Interface / IA)