I have been very happy with Daily Time Tracking, dailytimetracking.com (Mac) What is great about is that it just polls you every n minutes (based on your prefe

I have been very happy with Daily Time Tracking, dailytimetracking.com (Mac) What is great about is that it just polls you every n minutes (based on your preferences), and then you just: Press the 'V' button (if you are working on the same as before – our Shift+Ctrl+S) OR Write in the new task that you are working on OR Select an earlier task from a dropdown menu. Time is then automatically added to the task chosen. Then you can just see the total of time spent on each task or export the data to CSV, JSON etc. Not affiliated in any way, but has been working great for me.