The purpose of this study is to develop a Web- and Android-based learning application for high school students, named MoLearn. To meet teacher needs, a preliminary study was conducted by conducting interviews and field observations. The design and development follow the ADDIE model, with stages namely (1) analysis of needs, (2) design of interface, (3) development / construction, (4) implementation and (5) evaluation. The research subjects were educators who were members of the Biology and Geography MGMP, along with their students. The evaluation was carried out to the educators representing the respective MGMP, carried out by distributing questionnaires, and triangulation using the UI/UX test. Data analysis was performed with qualitative descriptive technique and descriptive statistic. Based on data analysis, the results show that all educators agree that (1) MoLearn's appearance is attractive and convenient to use, (2) MoLearn can fulfill learning needs, and (3) MoLearn has fulfilled the requirements as a learning model that utilizes Information Technology.