What apps should your therapist have on their iPad to show you what they are doing for you?

I have to refer you to Mike Reinolds' blog for this one.
I wish I could see the VisibleBody one. Only 19.99, your therapist can afford this one  after billing one of your sessions. I may have to get the 29.99 one for my PC.
http://www.mikereinold.com/2012/06/best-ipad-apps-for-physical-therapy.html