I know there is a program that tracks how much time you spend on each website, application, etc.. I tried googling but can't find it now, I'm sure someone will

I know there is a program that tracks how much time you spend on each website, application, etc.. I tried googling but can't find it now, I'm sure someone will remember if you think it's helpful? You install it (mac and win) and then could log into a control panel with all that info, updated to the minute!