<![CDATA[This study aims to develop mobile application-based interactive learning media designed to enhance conceptual understanding among elementary school students at Public Elementary School 1 (SD Negeri 1) in Cimahi City. The research followed a Research and Development (R&D) framework utilizing the ADDIE (Analysis, Design, Development, Implementation, Evaluation) model. The developed media was systematically evaluated for validity, practicality, and instructional effectiveness. Expert evaluations from media and subject-matter specialists demonstrated that the mobile application met high standards of technical design and pedagogical alignment. Practicality assessments, gathered through teacher and student response questionnaires, confirmed high usability, user-friendly navigation, and strong learning engagement. Furthermore, the effectiveness of the application was tested using a one-group pre-test and post-test design with fifth-grade students. Statistical analysis revealed a significant increase in students' conceptual understanding, supported by a high average normalized gain (N-gain) score. These results indicate that mobile application-based interactive learning media is a valid, practical, and effective tool for improving conceptual understanding in elementary school education.]]>
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