The purpose of this research was to develop a learning media in a form of android application using Sketchware for students of Department of Physics Education in State University of Jakarta taking Earth and Space Sciences course. This research used the method of ADDIE model for research and development. This research was done through five stages. On the first stage, questionnaire was issued to the students of Department of Physics Education for needs assessment. The second stage, design of broad guidelines of media content for android application development guidance such as flowchart and storyboard were made. The third stage was the development of prototype and media validation by chosen experts. The next stage was small group testing experiment which involved 15 participants of students, followed up with bigger group testing experiment which involved 40 students as participants. The last stage was evaluation and final product. Based on the results of validating the feasibility of learning media using Sketchware on rukyat and hilal reckoning materials, the application was declared "Very Valid" by material experts, linguists, and media experts, and received a “Very Valid” category response from students.
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