Halal tourism is a new phenomenon that has emerged due to the halal industry's rapid expansion, in 2021 expected to reach a value of 243 billion by 2021. In 2019, Global Muslim Travel Index (GMTI) reported that a Muslim-based platform is needed to support halal tourism services as one of the most critical aspects of halal tourism. One of the platforms available to support halal tourism in Indonesia is the HalalTrip application. The HalalTrip application is one of the Muslim-based applications with the highest number of users but less visible on the usage and has a low rating. To improve HalalTrip application performance, it is necessary to evaluate and improve the application. This research focused on redesigning the HalalTrip application user interface according to user needs and expectations. The evaluation process uses a quantitative method with a User Experience Questionnaire (UEQ) and open-ended questions. The user-centered design is used as an approach to redesign the user interface. The results of the redesigned user interface state that there is an increase in every aspect of UEQ and obtained a success rate value of 92% on the usability testing results.