Cosmose is a fully functional e-commerce mobile application developed using Flutter, supporting both Android and iOS platforms. This app offers a seamless shopping experience with a modern, user-friendly interface and robust feature set. Users can browse a wide variety of products, view detailed information, and easily add items to their cart or wishlist. The app includes secure user authentication, profile management, and account creation to personalize the user experience. Cosmose is integrated with Stripe for smooth and secure payment processing, and it maintains a complete history of payments and orders for each user. A unique feature of Cosmose is its screen sharing and live streaming functionality, allowing product owners to showcase their items in real-time, building trust and offering a more interactive shopping experience. From managing user accounts to enabling smooth checkout flows and real-time engagement, Cosmose brings together the core features of modern e-commerce in a cross-platform mobile app built entirely with Flutter.