ProSoft-Design has developed an Android app called Журнал преподавателя ДЕМО for teachers who want to keep track of student attendance and performance. The app is designed to help teachers manage their records and keep everything organized in one place.

However, the free version of the app has some limitations. Users can only create up to three groups and two subgroups for each group. Additionally, the app does not allow users to import a list of groups, subgroups, and students from a file. The option to export the journal in XLS (Excel) format is also unavailable.

In the paid version, users have access to unlimited groups, subgroups, and students. They can import a list of groups, subgroups, and students from a CSV file and export the journal in XLS format.

Overall, Журнал преподавателя ДЕМО is a useful app for teachers who want to keep track of attendance and performance. However, the free version's limitations may hinder its usefulness for some teachers.