The success of IPad apps (as with anything) are going to be very individualized to the child. What will work with one may not work with another. We actually found iPads could create a challenge in some therapy settings. Our software works with the therapist, allowing them to plan and track therapy sessions. If they sit down in front of a child who is used to using an iPad as a reinforcer, they won't be able to use the iPad for tracking therapy. We've overcome this with a mobile data collection app, but we know that therapists must have their eyes open when looking at the iPad as a total solution.
Jeff Blackwood
ABPathfinder Autism Software
http://abpathfinder.com 
