Wasting or investing time when i am on internet?

Is there any application/site which tracks ( after i am member of that site) what I am doing on internet and based on type of site it categorise my browsing history ( with amount of time I spent on that site ? ) e.g My interest is Tech and I am on tech site then it is time investment but if I am just browsing here and there then thats waste. I know that it is not straight but I believe that we need something like that to keep browsing habbit organized.