The development of muslim fashion worldwide has increased consumers demand for muslim clothing. This increases the opportunity to sell muslim clothing. Sale and purchase not only can be done with direct transaction between sellers and buyers, but also can be done with indirect transaction (online). Online transaction can be conducted using several media such as website, mobile apps, and others. The researcher built this online sale and purchase application with two different media, namely a website app using laravel framework for sellers and a mobile app using native java android for buyers. To make a suitable application, its development was carried out with a RAD (Rapid Application Development) method, which is a recurring method in system development where the model works with the system constructed in the early stage of development in order to determine the user's requirements. Then the app test was done with black box test to examine the functionality of the developed app and subsequently analyzed using usability app with a SUS (System Usability Scale) method, namely learnability, efficiency, and satisfaction. Based on the test results, it was found that all functions and items tested were valid. The result (final score) of app analysis was 82.58, including in grade A or excellent. This shows that this app is worthy of being used by end users as a tool to buy or sell muslim fashion. Keywords: laravel, native java android, RAD, SUS