Premium Test Series App

I want to launch a modern, minimalist mobile app on both iOS and Android that lets me sell and manage test-series for students while also sharing study material such as PDFs. The core flow is straightforward: learners sign up with phone-number + OTP, pick a test, and start practicing... (Budget: ₹1500 - ₹12500 INR, Jobs: Android, App Design, App Store Optimization, App Usability Analysis, iOS, iPhone, Mobile App Development, PHP, UI / User Interface, UX / User Experience)