I need a full-featured electronic point-of-sale application designed specifically for retail sales management and the day-to-day handling of retail product inventory. The same codebase should compile cleanly for both iOS and Android so my staff can work on any device in the store. Core workflow At the till a sales assistant should be able to scan a product (barcode or manual lookup), apply discounts or promotions, take card or cash payments, and send the digital or printed receipt straight from the app. Each sale must instantly adjust on-hand stock levels and update the back-office dashboard so we always see true current inventory. When a delivery arrives, I want the assistant to receive stock-in, scan items, and have quantities reflected immediately across every logged-in device. Key requirements • Reliable offline mode that queues transactions and syncs when a connection returns • Real-time inventory tracking with low-stock alerts • Simple product import (CSV or API) and bulk price updates • Secure user roles (admin, supervisor, cashier) • Dashboard charts for daily sales, top products and margin • Support for popular receipt printers and barcode scanners over Bluetooth or USB • Clean, intuitive interface that looks native on both platforms Tech preferences I lean toward Flutter or React Native with a lightweight Node / Firebase style backend, but I’m open to other proven stacks if you can justify the choice for speed and maintainability. Deliverables 1. Clickable Figma or XD prototype for approval 2. Production-ready iOS & Android apps submitted to TestFlight / Play Console 3. Source code in a private Git repo with install docs 4. Basic user manual and one-hour hand-over call Please include examples of previous EPOS or inventory apps you’ve shipped and outline the timeframe you’ll need from design sign-off to store release.