<![CDATA[Sales and inventory management are important activities in store operations. At Apan Cell, transaction and inventory recording are still performed manually, which may lead to recording errors, service delays, and difficulties in preparing reports. This research aims to design and develop an Android-based cashier application to support sales and inventory management at Apan Cell. The system was developed using the Rapid Application Development (RAD) method, which consists of requirements planning, system design, development, and implementation. The results show that the application was successfully implemented with features for registration, login, product management, product sales transactions, service transactions, and sales reporting, as well as role-based access for Admin and Cashier. Whitebox Testing was conducted on five main functions, namely registration, login, adding products, product transactions, and service transactions. The results showed that all tested functions were successfully executed according to the designed independent paths, with no errors affecting the main functions of the application. Based on these results, the developed application can support sales and inventory management at Apan Cell in a more structured and effective manner.]]>
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