Convert Web App to Mobile

I already run a fully-functioning web application and now want to give my users a true mobile experience. The goal is to create a full-featured mobile app for both iOS and Android that mirrors (and eventually surpasses) everything the current web version offers... (Budget: ₹1500 - ₹12500 INR, Jobs: Android, Android App Development, Flutter, iOS Development, iPhone, Mobile App Development, PhoneGap, React Native)