I run a custom-print shop and want a companion mobile app that works seamlessly on both iOS and Android. The app will serve two roles: customers and me as the shop owner. For customers, the experience must feel like a small e-commerce catalog. They open the app, browse my latest design collections with smooth image zoom, and add items to a cart. Checkout should capture size, quantity, delivery address, and preferred payment method; I’m open to Stripe, Razorpay, Apple/Google Pay, or any widely supported gateway you recommend. Customers do not need to upload their own graphics—only view what I publish and place orders. On the shop-owner side I need a secure login that lets me upload new designs, edit descriptions, set prices, and mark orders as fulfilled. A lightweight dashboard—whether in the same app behind an admin toggle or a small web panel sharing the same database—is fine as long as it’s easy for me to keep the catalog fresh. Core expectations • Native or cross-platform codebase that ships to the App Store and Google Play • Clean UI that follows current iOS Human Interface Guidelines and Material Design on Android • Push notifications for order status updates • Source code, documentation, and hand-over support until the apps are live in both stores Please outline your proposed tech stack (React Native, Flutter, Swift/Kotlin, etc.), estimated timeline, and any previous work that proves you can deliver a polished retail experience. I’m happy to answer follow-up questions right away so we can move forward.