So, I know mathematica can be run with the math kernel in a command line type interface. I wonder if any one knows how to load this on the phone. Right now the current option is to goto wolfromalpha.com and slow peck in the integral. A great option would be either and App that links to the website or just loading the mathkernel.
I'm sure people think this isn't very useful, but wouldnt you like to use the powerful capabilities of the crank out an integral.