the most accurate dyno program for iphone is dynolicious
My brother got dynolicious on his touch, along with the proper mount to use dynolicious. Said my car made 225whp at 6.5-7psi. Oh, and we weighed the car right before to be as accurate as possible.
Yea or you can also go to DealExtreme.com. Thats where my bro got his and mine.