This study aims to build Android-based Markerless Augmented Reality as a learning media in the Construction field, specifically Bridge material for vocational students. This study applies the Extreme programming method, which consists of the Planning, Design, Coding, and Testing stages. The developers and potential users performed the tests. The Functional Usability test results using Black-Box testing reveal that all features in the application can operate successfully. In terms of compatibility, the application is declared very suitable for use. The application has proven successful in running on several kinds of Android smartphones with different versions and screen resolutions. Meanwhile, in terms of Usability, the application acquires an eligibility percentage of 84.2%. Users find it easy to operate the application since they can immediately run 3D objects wherever they are, without being limited by the presence of markers. They consider being freer to run AR applications. However, the Markerless application that has been built can only be operated on Android smartphones version 7.0 and above.