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The rapid advancement of the latest technology, the absence of interactive multimedia in schools and the inferior ability of students mathematical representation creating an alternative breakthrough in developing Android-based learning applications. The purpose of the research is to improve the ability of students mathematical representation through Android Challenge Based Learning. The quasi-experimental examination held at the Madrasah Aliyah Negeri II Bandung. It involved 79 students, 39 experimental classes and 40 control classes. The findings indicated that there an increased ability of mathematical representations of students with Android-based Challenge Based Learning than students in the regular class. There was no difference in the performance of mathematical representation between students with Challenge Based Learning based on Android and conventional learning based on Early Mathematics Knowledge in the High, Medium and Low categories. Challenge based learning based on android facilitated the process of conflict, discovery, social interaction, and reflective processes of students so that the ability of mathematical representation is improved while the material easily understood and exciting.