I made this as a way to help me stop looking at my keyboard while I type. I learned how to touch type about 2 months ago and one of the tenets of it is to never look at your keyboard. I eventually forgot that tenet, and now I'm stuck with the habit of looking at my keyboard. So, what Typro does is play a sound when your head tilts down, below a certain angle. The sound reminds you to look up.