E-Commerce Mobile App Build

I want to turn my concept “Mimujer y yo” into a fully functional mobile e-commerce app. The core requirement is a smooth shopping-cart experience that lets customers add, edit, and remove items before checkout. I already know the app’s main goal—selling products—so I need someone who can take that objective and translate it into an intuitive, secure mobile application. Design the user flow around browsing a catalog, tapping an item, and moving it straight into the cart. Payment processing, account creation, and order confirmation screens should all support that flow without friction. If you have existing modules for product search, filters, or user reviews, let me know; they could become the next phase, but right now the shopping cart is the must-have deliverable. Please outline: • Your preferred tech stack for iOS and/or Android • How you handle secure payments and data storage • A realistic timeline for delivering a tested shopping-cart module integrated with my product list Clean code, clear documentation, and a UI that feels modern and friendly are essential.