Fleet play online

Fleet, is an application for managing all the college function at a single place.
college functions includes:
Student Attendance
Notes access for students given by faculty.
and many more is in the app.
Main function of this app is the Attendance system that makes the app different from others.
About Attendance:
In this app student can not make proxy attendance ....
wondering what is special?
so, in this app the backend is built like this that student can not mark their attendance standing outside the class.