Multiplatform Course & Product Sales App

I’m ready to turn my idea for a comprehensive learning platform into a production-ready application. The core experience is straightforward: users stream high-quality video courses, track their progress, and—whenever a lesson mentions a helpful item—buy the related product without leaving the app.

Platforms
The app must launch simultaneously on iOS, Android, and the web. I’m open to Flutter, React Native, or any comparable framework that lets one codebase drive all three clients while keeping native performance and store-ready builds.

Learning features
• Browse a structured video library with categories and search
• Smooth HD playback, resume where you left off, and offline viewing if feasible
• Quizzes or checkpoints to mark completion and award certificates
• Progress and purchases synced instantly across devices

Commerce features
• Product catalogue that links directly to specific courses or lessons
• In-app cart and secure checkout (Stripe, Apple Pay, Google Pay, or similar)
• Order history, basic inventory controls, and automated email receipts

Admin & analytics
An online dashboard should let me upload new videos, set course prices (subscription or one-time), add or remove products, issue coupons, and view real-time sales/engagement stats.

Deliverables
1. Source code for mobile and web apps
2. Scalable back-end with documented REST/GraphQL API
3. Approved UI/UX mock-ups before full build
4. Deployment scripts plus App Store, Play Store, and web hosting hand-off
5. A brief user manual and live walk-through

Acceptance criteria
• Video streams reliably on 3 G or better
• Completed purchases reach my dashboard and send confirmation email every time
• Progress sync works across at least two logged-in devices
• Web app scores 80 + on Lighthouse performance

If you have prior work integrating video streaming and e-commerce in a single codebase, please share it; that experience will be key.