React Native Cashier POS – Barcode Scanner, Cart, Receipt Printing

React Native Cashier POS is a fully functional point‑of‑sale mobile application for small to medium businesses. It works offline (local database) and includes everything needed to start selling immediately.

🚀 Features

📱 Cashier (Transaction) Screen

Scan product barcodes using device camera

Manual product search with real‑time filtering

Add to cart, edit quantity, remove items

Clear cart with confirmation

Multiple payment methods: Cash, Bank Transfer, QRIS

Instant amount buttons (10K, 20K, 50K, etc.) for cash payments

Automatic change calculation

Complete transaction processing with stock deduction

PDF receipt generation and sharing (print / save)

📦 Product Management Screen

List all products with stock status (normal / low / out)

Search by name, barcode, or category

Add new product – name, barcode (scan / manual / generate), category, purchase price, selling price, stock, min stock, unit

Edit product details

Delete product with confirmation

Quick statistics bar (total products, low stock, out of stock)

Barcode scanner integrated for both add and edit forms

Automatic profit & profit percentage display

📊 Database & Services

SQLite local database (offline‑first)

Full CRUD for products, categories, transactions

Transaction history and sales reports ready (can be extended)

Services: ProductService, CategoryService, TransactionService

🎨 UI/UX

Material Design inspired

Bottom navigation (Home, POS, Products, Reports)

Responsive layout for various screen sizes

Loading states, empty states, and error alerts

🛠 Technical Requirements

React Native (Expo managed workflow)

Node.js 14+

Expo CLI

Android / iOS device or emulator

📦 Included in Package

Full source code (React Native + Expo)

🧪 Tested On

Android 10, 11, 12, 13

Expo Go & custom development builds

🔧 Installation (Brief)

Unzip the package

Run npm install

Run expo start

Scan QR code with Expo Go app