Sushi suggested - Categorize trackers

[cchampou]

So i was thinking about how it would look if people would be able to choose the category of work they are working on, for instance, if you're playing piano, the category could be hobby and if you're working, it can be work. At the end of the month, a pie chart can show how much time the user is investing on each of their tasks or something like that.
It can be a nice way of time management or for reference i guess
each of their tasks according to the category they choose