I’m launching a grocery-delivery service and need a complete Android application that lets customers create secure user profiles, fill a shopping cart, and pay seamlessly through Google Pay. The flow should feel as effortless as any modern retail app: browse, tap to add, review the cart, then check out with one-touch Google Pay and receive an on-screen and email receipt. I’ll supply product data and basic branding; you turn that into a polished, Material-compliant UI, coded in Android-native tech you’re most comfortable with (Kotlin or Java in Android Studio are fine). An admin back-end or lightweight Firebase console that lets me update inventory, prices, and order status would be ideal, but I’m open to the simplest reliable approach. Deliverables • Production-ready APK plus full, well-commented source code • Google Pay integration configured for sandbox and ready for live keys • Brief deployment guide and hand-over session so I can upload future builds myself Acceptance criteria The app must install cleanly on Android 11+ devices, process a test order end-to-end with Google Pay, and pass Play Store review without changes.