Simple Cross-Platform Mobile App

I want to turn a straightforward mobile app concept into a fully functioning cross-platform application for both iOS and Android. The full feature set is ready to share once we agree on the collaboration, but the scope is compact and clear-cut... (Budget: ₹600 - ₹1500 INR, Jobs: Android, Flutter, iOS Development, iPhone, Mobile App Development, Node.js, PHP, React Native, React.js, Web Development)