An idea about automated polar alignment

Now we have smart phones which really help us on finding our targets.

I'm thinking we should be able to use them to align polar alignment.  Most, if not all, smart phones are equipped with a camera, and through afocal imaging, the camera could detect a bright star in the eyepiece. 

By following the drift of the star, the smart phone can actually help us to do drift polar alignment by asking the user to adjust the polar axes.  It could be done rather easily.