I need a full-featured mobile shopping experience that runs smoothly on both iOS and Android. Core requirements are straightforward: customers must be able to browse a catalog, add items to a cart, and check out securely with popular payment gateways. A clean product search, push notifications for order updates, and basic account management round out the MVP. I will supply brand assets, product data in CSV, and API documentation for our existing inventory system. Your job is to design the UI, wire the front end to those APIs, and ensure the app sails through App Store and Google Play review. I’m comfortable with React Native or Flutter, but if you have a different cross-platform stack that hits the same quality bar, let’s discuss it. Source code, build scripts, and a brief “how to deploy” guide are the final deliverables.