The iProperRest works as a rest reminder memorandum, and it lives in your menu bar. when you have been sitting in front of the screen too long, this application will show you a remind message and tell you that it is time to take a rest or have a coffee break.
More importantly, the iProperRest provide parental controls capability that let you manage your children's using time of this computer, and tell your children rest their eyes from time to time.