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.
S2 7.9 - cheap, fast, trailerable, and paid for.