time tracker - the ability in a couple of clicks to record information about the time spent on the lesson and indicate its category. It is necessary to have the ability to do unloading in a tabular format (perhaps Google dox)
habits is a small module that creates a ribbon of days and actions that need to be performed: for example, wring out 20 times, water a flower. You can set the periodicity and move specific actions to adjust the execution date if necessary
Actually I'm not sure about usefulness of time tracking
IRus
commented
3 years ago 
Something between a todo sheet and a calendar.
I see these basic features:
Actually I'm not sure about usefulness of time tracking