Hello,
Probably the text of my message didn't appear when it was opened.
I'll try to copy it here again.
I think the simplest thing is to open your browser and run Csound through the online IDE. Performance is pretty good.
The only way currently to use Csound natively on iOS as far as I know is to roll your own.
...or download Coke Soundz 
Prof. Victor Lazzarini
Maynooth University
Ireland