Attendance in educational institutions is an important thing that is always a common concern, attendance is used to measure student performance or seriousness in taking education. Klabat University as an Educational institution, in this case at the Faculty of Computer Science. Trying to manage attendance as well as possible to get information that is fast, precise and accurate. with this information about attendance, this institution can find out what things need to be improved and what things should be limited, or what decisions must be made for student success, which are related to attendance. The need for attendance reports at the Computer Faculty of Klabat University is urgently needed. Currently attendance report are still using paper, and the process for creating the report are by manual input one by one for generating the report. This research will create an application that runs on the Android operating system and this application will later be accessed with an Android-based smartphone with a student ID card barcode scan feature, as a marker of student attendance, so the report can be generated automatically into the system. The research model or method used is the Prototyping method. Prototyping design models are made faster so that the time needed for system development is shorter. This characteristic is very suitable with the needs of the existing system that only requires a short time in its development. The tools that will be used by researcher are MIT App Inventor to build an Android applications. For the purposes of real time reports of student attendance, researcher will use Google apps as a data storage facility and as a means for generating reports. The results of this study are expected to create an android-based mobile application that in real time can send student attendance data that can be accessed directly anytime and anywhere in the form of attendance report data. For future development, researcher may suggest to use other method than barcode scanning. RFID or NFC tag supported for student ID Card can be use for attendance check.