So far seems useful, doesn't come with many symbols but you can take your own pics. Called MyPECS. It was £2.99. I am hoping that we can use it instead of the millions of tiny pieces of laminated paper that are his alleged schedule (or would be if he hadn't flushed all the ones he didn't like - we are currently left with DVD, DS, Book, Walk and No School. 
)
Anyone else got it or used it or similar?