Seems I'm late to the part, but here goes anyway:
Just wanted to give everyone a heads up about a newer fractal app for Iphone and Ipad.
It is called FRAX, and was made by three developers, Ben Weiss , Kai Krause and Tom Beddard.
You might know Tom Beddard from his subblue blog, where he writes about generative art, including fractals.
I"m posting an image made with frax to the left of this post.
Here is the link for frax : frax
and here is the link for subblue, which has some great fractals and fractal animations that will blow you away!