Cross-Platform Utility App Development

I need a single code-base app that runs smoothly on both iOS and Android. The core purpose is to give users an intuitive tool where they can create, track, and prioritise tasks, then turn that information into clear, lightweight analytics they can act on... (Budget: ₹12500 - ₹37500 INR, Jobs: Android, App Development, Data Analysis, Flutter, iOS Development, iPhone, JavaScript, Mobile App Development, React Native, Software Development)