I’m building a “Smart Kirana” application that lets my customers order groceries straight from their Android phones. The core experience is classic online grocery shopping: clean product listings, an easy-to-use cart, and a smooth checkout flow. Key requirements • Platform: Android only (phone & tablet friendly). • Payments: native UPI plus popular digital wallet options such as Google Pay, PhonePe and Paytm. No card gateway is needed at this stage. • Flow: browse → search/filter → add to cart → schedule delivery/pick-up → pay → receive order status updates (push notifications or in-app). Deliverables – Production-ready APK and full source code. – Brief admin interface or straightforward JSON/API hooks so I can update products, prices and stock. – Setup instructions and minimal walkthrough documentation so I can compile and publish the app myself. Acceptance criteria 1. A test build installs on Android 8.0+. 2. Checkout completes end-to-end with both UPI and at least one digital wallet in a sandbox or live low-value mode. 3. Product, price and image changes made from the back-end reflect in the app without a new build. If you’ve launched retail or grocery apps before and can point me to live links or APKs, that will help me shortlist quickly. Looking forward to your questions and a clear development timeline.