We are planning to develop a Professional Android-based E-Learning Application for 12th class students (18+ age group). The main objective of this application is to sell paid video courses and provide secure online learning through a mobile platform. The app will allow students to purchase subject-wise courses, watch protected video lectures, and access study materials such as PDFs, while ensuring strong anti-piracy and content security. Target Users Students of Class 12 (18+ years) Preparing for board exams and competitive exams Users comfortable with mobile-based online learning Key Features 1. User Authentication Secure login using Mobile Number + OTP Firebase Authentication Age confirmation (18+) 2. Course Management Subject-wise course listing (Physics, Chemistry, Mathematics) Course details including description, poster, price, and validity Purchased courses automatically unlocked after successful payment 3. Secure Video Learning DRM-protected video streaming (Vimeo OTT / AWS DRM) Videos playable only inside the app Screenshot and screen recording completely blocked Token-based video access to prevent sharing and piracy 4. Payment Integration Razorpay payment gateway Supports UPI, debit/credit cards, and net banking Automatic course unlock after payment verification 5. Study Materials Chapter-wise PDF notes In-app PDF reader Download and screenshot disabled Optional user watermarking 6. Admin Panel (Web-Based) Course creation and management Video and PDF upload Price and validity control Student management Payment and revenue reports 7. Notifications Push notifications for new videos, announcements, and offers Technology Stack Frontend App: Flutter (Android-first, iOS-ready) Backend: Node.js + Express Database & Auth: Firebase (Firestore, Authentication, FCM) Payment Gateway: Razorpay Video Hosting: Vimeo OTT / AWS S3 + CloudFront + DRM Security & Compliance DRM-based video protection Screen capture and recording prevention Secure API authentication Root and emulator detection (optional) Google Play Store policy compliant Project Deliverables Complete Flutter mobile application source code Backend (Node.js) source code Web-based admin panel Firebase and payment gateway setup under client’s ownership APK/AAB build for Play Store upload Documentation for app and admin usage Expected Outcome A scalable, secure, and professional e-learning platform that allows the teacher to sell courses directly to students, maintain full ownership of content, and protect educational material from piracy.