Lack of student interest in learning can be influenced by several factors, one of which is the lack of learning media. Augmented Reality is an interactive experience that combines the real world and computer-generated content. AR can be defined as a system that incorporates three basic features: a combination of real and virtual worlds, real-time interaction, and accurate 3D registration of virtual and real objects. The waterfall model used in this research is the oldest and the most well-known SDLC model. The special feature of this model is its sequential steps. It goes down through the phases of requirement analysis, design, development, testing, and maintenance. This study aims to build an application for English learning media using Augmented Reality technology with Marker Based Tracking and measuring the effectiveness of the application for English learning media. In the main menu of the application there are several buttons such as: course, about, guide and exit button. The application testing technique used is User Acceptance Testing (UAT). From the results of testing the application device can run perfectly on Android smartphones from Android version 11 to Android 13. The results of testing the responses from students and teachers show that this application is so worth it, with a percentage value of 91%. The effectiveness of this application is classified as effective in increasing student understanding, this is evidenced by the average pretest and post-test scores increasing from 55,2 to 79.6 with an increase of 24.4%.