I need a full-featured e-commerce app that runs smoothly on both iOS and Android. The core flow should cover browsing a product catalogue, adding items to a cart, secure checkout with multiple payment gateways, and real-time order tracking. Clean, intuitive UI/UX and fast load times are priorities; think the polished feel users expect from leading retail apps. I will supply product data and brand assets—everything else, from architecture to final build uploads, is part of this engagement. A cross-platform stack such as Flutter or React Native is fine as long as it delivers native performance and passes Apple App Store and Google Play review. Server-side work is limited to the APIs the app consumes; if you can also spin up/admin a lightweight backend (Node, Firebase, or similar) let me know so we can scope that in. Deliverables • Source code with clear documentation • Test builds for iOS (IPA/TestFlight) and Android (APK/AAB) • Production-ready builds approved in both stores • Brief hand-over session walking through deployment and maintenance Acceptance criteria: the app completes a full purchase cycle without errors, product images/cache behave properly offline, and store reviewers approve the first submission.