Cross-Platform JEE Prep App

I want to create a full-featured JEE preparation app available on iOS, Android, and the web. The heart of the product is a robust Past Year Question (PYQ) engine where students can browse, filter, and take timed or untimed attempts at every previous JEE paper. After each attempt, the app should instantly show correct answers, detailed solutions, and performance analytics such as accuracy by topic, speed per question, and a projected percentile.

While PYQ practice is the priority, I also need the architecture to accommodate two added learning modes: 1) custom mock tests that mimic the real JEE pattern and score calculation and 2) live or recorded video classes that can be scheduled, streamed, and replayed inside the same interface. These modules can follow once the core question engine is in place, so please keep them in mind when choosing frameworks, database schema, and API design.

A single codebase (for instance React Native or Flutter plus a responsive web build) is preferred so updates stay in sync across platforms. A lightweight backend—Node, Firebase, or anything equally scalable—should handle user auth, progress tracking, and content management. The timetable is flexible; I care more about a clean, maintainable foundation than hitting an arbitrary deadline.

Deliverables I expect:
• Universal app builds for iOS, Android, and web, all drawing from one shared codebase
• A functional PYQ module with searchable question bank, timed practice, solution reveal, and analytics dashboard
• Source code in a private repository with clear setup instructions
• Documentation covering tech stack, database structure, and how the next features (mock tests, live/recorded classes) will plug in

I’ll provide the full question database, solution text, and any design assets the moment we kick off. Let me know what stack you would choose, how you plan to structure the project, and an outline of milestones so we can agree on a smooth build process.