I was looking for iPhone apps that might be useful for remote control helicopters. I found the following on the iTunes store:

App Name & Link Author Screen Capture (Click to zoom in)

(a.k.a- Heli-Headspeed)

Jacob Niehus Heli Tach
RCpitch_express and RCpitch Gerhard Klauser RC Pitch
rcFlightbook Claus Bonnhoff

I’ve downloaded them and will do a review.  If you have tried these apps, leave a comment below with your opinion.