Re: Tiller pilot to I phone app?
You would need one of these:
Web Based NMEA 2000? Adapter Links Data to PC's, iPad?, iPhone?, Android? and Other Wi-Fi Devices
Which is an NMEA to WIFI interface, and the app to go along with it...
Then you'd need to interface the TP with and NMEA bus.
"Rum Line" an S2 7.9 - cheap, fast, trailerable, and paid for.