ShopSphere is a full-featured e-commerce mobile application built with React Native, designed to run smoothly on both Android and iOS from a single codebase. The app includes secure authentication using a role-based access system with REST API + JWT, allowing users and admins to manage accounts safely. The product experience features fast search, wishlist, reviews, and an offline-first approach for browsing and cart handling. Real-time updates are supported using WebSocket-style logic for order status and inventory sync. The checkout flow is integrated with a payment gateway, ensuring secure transactions and refund handling. Push notifications via Firebase are used for order updates, promotions, and alerts. On the backend, a MERN-based admin dashboard provides full control over products, users, orders, and reviews, along with real-time analytics dashboards and admin panels with charts for business insights. The system supports serverless deployment (AWS/Firebase) for scalability and