Activity Timer keeps track of the time you spend at the computer on projects or activities. It keeps track of all the times when you use the mouse or keyboard. You can also set it to automatically change project when you use particular windows. You can also play or shows screen alarms as a reminder to stop work after a preset period of time. You can also set it to play or show reminders to look away from the screen for a few seconds from time to time as advised by eye doctors - this can mitigate that tiredness of the eyes that can result from lo