Cross-Platform Tuition Management App

I run a tuition centre that serves roughly 200 students every year and I need a single application that works seamlessly on iOS, Android, Windows and macOS. The core job is to build an app that lets me: • Take attendance by manual entry, automatically logging the exact date and time for every class... (Budget: ₹12500 - ₹37500 INR, Jobs: Android, Database Management, Flutter, iOS Development, iPhone, Mobile App Development, PHP, React Native)