CartSnap is a lightning-fast, offline-first Point of Sale (POS) and inventory management application built with Flutter. Designed for seamless retail operations, it features instant barcode scanning, permanent local caching, and native ESC/POS hardware integration for wireless thermal printing.
- 📴 Offline-First Architecture: Powered by a robust local
SharedPreferencesdatabase. No internet required to scan, bill, or print. Zero latency, zero cloud dependency. - 🖨️ Native Hardware Printing: Seamlessly pairs with standard 58mm Bluetooth Thermal Printers via ESC/POS byte commands for instant, professional receipt generation.
- 📦 Dynamic Inventory Management: Interactive bottom-sheet explorer with swipe-to-delete functionality and inline price modifiers.
- 🧠 Smart Cart Engine: Rapid item counting, real-time total calculations, and intelligent duplicate-scan detection to prevent checkout errors.
- 📊 Ledger & History: A dedicated historical timeline view to audit past transactions, track daily sales totals, and effortlessly print duplicate invoices.
- 🎨 Premium Bento UI: A modern, edge-to-edge dashboard layout optimized for speed, clarity, and one-handed mobile operations.
- Go to the Releases section of this repository or download directly:
- Download and install the APK on your Android device (ensure "Install from Unknown Sources" is enabled in settings).
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Clone the repository:
git clone https://github.com/byteWizard-zero/cartsnap.git cd cartsnap -
Fetch Flutter dependencies:
flutter pub get
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Run the app on your connected device or emulator:
flutter run
To use the physical receipt printing feature:
- Turn on your 58mm Bluetooth Thermal Printer.
- Pair the printer with your Android device via the native OS Bluetooth Settings.
- Open the Smart Billing App and tap the Printer card on the dashboard.
- Select your paired printer from the list and tap Connect.
- Once the status light turns green, your checkout stream is physically armed!
Soumya Ranjan Jana — IoT & Systems Engineer • Computer Science Student at ITER (Siksha 'O' Anusandhan)
I specialize in building real-world distributed architectures, manual sorting loops, and AI-driven workflows. This application was engineered to demonstrate the power of local hardware integrations and edge-computing principles within mobile applications.
- GitHub: @byteWizard-zero