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This study aims to develop and test the feasibility of learning media in the form of Android-based Physics Education to improve students critical thinking skills in mechanical wave material. This research belongs to the Research and Development (R & D) research category with a research design using a 4D model consisting of define (design), design (develop), develop (development) and disseminate (dissemination). Validation is carried out at the develop stage by involving media experts and material experts. The study produced an Android-based physics learning media in the form of Physics Education (PhyEdu) with the results of validation obtained feasible to be tested but needed improvement in the appearance of the media.