I am creating a Snapsell-style paywall that works seamlessly across iOS, Android, and the web. The goal is simple: let users unlock individual file (clips, images, Pdfs etc with a single, secure payment and immediately gain access to the files. Core scope • Build one unified code-base (Flutter, React Native, or another cross-platform stack you prefer) compiled to native iOS/Android binaries plus a responsive web front end. • Implement a one-time payment flow using Stripe, Apple Pay, and Google Pay; no recurring subscriptions or tiered access right now, but keeping the code modular so those can be added later is a plus. • 18+ content option. After payment the User should move from teaser mode to the unlocked files without page refresh on web or noticeable lag on mobile. • Provide a lightweight admin dashboard where I can paste or upload the article, set the price, and view real-time sales analytics. • Secure backend with REST or GraphQL API, webhook handling, and basic fraud checks. Acceptance criteria 1. Paywall displays correctly on modern browsers and the latest two major OS versions for iOS and Android. 2. End-to-end payment succeeds in test and live modes with Stripe test cards, Apple Pay, and Google Pay Sandbox. 3. Unlocked files remain available to the purchaser on all their logged-in devices. 4. Source code, environment files, and a straight-forward deployment guide (Docker or similar) are delivered. 5. Affiliate Feature / Partner Program (MLM possible) If you have prior experience building micropayment gateways or content monetisation tools, that will help us move quickly. Let me know the framework you recommend and a rough outline of how you plan to structure the project so we can get started right away. I want it exactly Similar to Snapsell, but more impressive Design.