User Interface (UI) and User Experience (UX) are the most important factors in an application. It is because the User Interface and User Experience is the link between the user and the system. The purpose of this research is to discuss about how much influence the User Interface and User Experience have on the sale of an application. This research used the observation method. The results of this study show that the quality of the User Interface and User Experience can solves the problem. User Interface and User Experience in the application will help users to know what needs to be done to solve a problem. A good User Interface and User Experience will help users to get information aaccording to what the users needed. Therefore, every application that has a good User Interface and User Experience will make users comfortable.

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