Supiori Regency has coastal attractions with considerable potential to be developed as regional tourism assets. However, the use of digital technology as an interactive
promotional medium for coastal tourism remains limited. This study aims to design and develop an Android-based Augmented Reality application to demonstrate the potential of promoting the coastal beauty of Supiori Regency. The application is designed to present visual objects and coastal information through Augmented Reality technology, providing users with a more engaging visual experience. The research method includes literature study, user needs analysis through questionnaires, system design, software development, and application testing. The application is evaluated using the User Acceptance Testing (UAT) method to assess user acceptance in terms of functionality, ease of use, and appearance. The results indicate that the application runs properly and is easy to use. Based on these results, the developed application shows potential as a digital promotional medium for introducing the coastal beauty of Supiori Regency to the public.