Smart scan and go shopping system using flask and QR/Barcode Technology

The retail sector continues to face persistent challenges related to billing delays, long checkout queues, and inefficient customer handling during peak shopping periods. Traditional billing depends heavily on cashier-operated counters, where each product must be scanned and processed sequentially, often creating congestion and reducing customer satisfaction. This paper presents ScanandGo, a smart self-checkout shopping system that combines a Flask-based backend, a Flutter mobile application, a web-based administrative portal, MySQL database management, QR code product identification, and secure exit verification. The proposed system enables customers to scan product QR codes while shopping, add products to a virtual cart, monitor the bill in real time, and complete checkout using online or cash-based payment workflows. After successful payment, the system generates a digital receipt encoded as a QR token, which is later verified at the store exit. The system is intended to reduce billing time, improve transaction accuracy, lower cashier dependency, and modernize the shopping experience in a cost-effective way. The paper discusses the motivation, objectives, literature background, system architecture, methodology, database design, implementation modules, expected results, limitations, and future scope of the proposed model.