Movie Sales Mobile App

I want to launch a polished mobile application for both Android and iPhone that lets users browse, purchase, and immediately enjoy entertainment movies. The core flow is simple: users open the app, discover titles through search or curated lists, pay securely, and then either stream instantly or download for later viewing. All transactions are handled in-app, so a seamless payment gateway (Stripe, Apple/Google in-app purchase, or a comparable solution) is essential.

Key elements I need built in:
• A modern, visually rich catalogue with cover art, trailers, and detailed metadata
• Secure account creation with email, social, or phone login
• Purchase flow that supports one-time buys, rentals, and, if feasible, future subscription bundles
• A personal library where buyers can rewatch previously purchased titles
• Adaptive streaming to handle varied connection speeds and device capabilities
• Push notifications for new releases and relevant promotions
• A lightweight admin panel so I can upload movies, set prices, view sales analytics, and manage users

Deliverables:
1. Fully tested Android (APK/AAB) and iOS (IPA) builds ready for store submission
2. Source code with clear documentation and build instructions
3. Backend/API and database schema deployed on my preferred cloud (Firebase, AWS, or similar)
4. Admin panel URL and credentials
5. Brief hand-over session or recorded walkthrough covering deployment, content upload, and routine maintenance

I already have the movie catalog and artwork prepared; your focus will be on engineering, UI/UX, and integration. I value clean, maintainable code and timely communication, so please outline your preferred tech stack, any streaming DRM experience, and an estimated timeline for first prototype and final release.