I need a straightforward Android application that lets pharmacy retailers log in, browse my current medicine inventory, and create an order in just a few taps. When they confirm the cart, the app should automatically generate a clean-looking PDF that lists every item, the retailer’s contact information, and precise time-stamps, then email that PDF directly to my wholesale address so my team can print and pack it right away. No in-app payments are necessary for this first release. Inventory management must stay simple for us on the wholesale side: a password-protected web or desktop back-office where I can upload an Excel sheet and instantly refresh stock levels and pricing across the app. Retailers will only ever see the live values pushed from that sheet. Core flow I’m expecting: • Retailer registration and secure login • Medicine search with filters or direct code lookup • Add to cart, edit quantities, place order • Automatic PDF generation + email dispatch (order, retailer details, timestamps) • Admin panel for bulk stock updates via Excel import Please build with maintainability in mind and document any open-source libraries you rely on (e.g., PDF generation, email service, Excel parser). A fully working APK and complete source code will be the deliverable; if you can include lightweight deployment notes for the admin panel, even better.