Firebase Grocery Android Web App

I’m after a straightforward grocery-ordering web app that runs smoothly on Android phones. The back end will be Firebase: categories and products must be pulled from Firestore and displayed in real time.

Shoppers will be able to browse by category, view products, add items to a cart and place an order using a single “Cash on Delivery” option—no online payments or gateways are required. Each customer account only needs an order-history screen so users can check what they bought before; no profile management, address book or extra roles are necessary.

Deliverables I expect:
• Responsive front-end (PWA or WebView-ready)
• Firebase integration for auth, data fetch and order storage
• Cart and COD checkout flow with basic success screen
• Customer order-history page
• Clean, minimal UI plus complete source code and a short README explaining build and deployment steps

Any lightweight stack—React, Vue, Flutter Web, etc.—is fine as long as it keeps the app fast on mid-range Android devices. Tell me which you prefer and how you’ll structure the Firestore collections, and we can get started.