http://www.topappcharts.com/375225937/app-details-expressionpad.php
Other than some touch handling subtleties, it's pretty much what I would end up with if I listened carefully to what people ask for and changed Mugician. I am sure that I will find MIDI useful for the more ordinary stuff that I do, in spite of its stability issues in MIDI mode. So, this demonstrates that I am doing the right thing and sticking to my microtonal guns, and not worrying too much about the cries for MIDI; as this is almost the same instrument minus the subtle microtonal story - it has good latency too! Here is a video of me pushing it around, to show low latency, not stuck in any particular scale, etc. The sound engine isn't fantastic, but much of the sound of an instrument actually comes from its ergonomics; unless you don't actually know how to really *play* it.
http://www.youtube.com/watch?v=0nOcEG8Xtn4
This developer also charged what I am often told that Mug

I have my doubts that he sold enough for this obscurity to be worth the trouble. I have made a lot of very cool friends, and have some major label artists on my permanent record.
Oh, and the day after I made a video for it, it shot up in the rankings from #1700 something to #60! (it maxed at #13) (You are welcome sir!) :-) Pretty good considering that it's not being maintained right now.