Coaching App with Commerce Features

I need an intuitive coaching app that allows users to discover courses, connect with instructors, and pay for sessions or learning materials directly inside the app while also showcasing relevant products. The experience should feel seamless from browsing through to checkout, with a clean interface that makes it easy for learners to stick with their goals.

Core deliverables
• Connecting people to courses – searchable catalogue, coach profiles, enrolment flow
• Handling transactions – secure in-app payments, receipts, basic order history
• Advertising products – space for banners or promoted items that can be managed from an admin view

Code must be production-ready, well-documented, and structured so new modules (extra courses or ads) can be added without a full rebuild. I’m open to Flutter, React Native, or another cross-platform stack if you can justify the choice. APIs should follow standard REST or GraphQL practices, and data security is paramount—please factor encryption and safe storage into the design.

Hand-over includes the complete source in a private repo, build instructions, and a brief walk-through of the architecture so I can maintain or extend it later.