The mobile application for the Android platform is dedicated to teachers and principals who want to document the course of lessons using a mobile device. The application works with the LIBRUS Synergia solution available at: https://synergia.librus.pl. The application allows every teacher and director with an active account to conduct classes. The application enables: - checking the teacher's timetable, - recording the lessons carried out, - the use of timetables of teaching material, - adding