Re: ipad as instrumentation...
Raymarine e7d's (and larger) do the wifi network with phones, tablets etc.. both remote viewing and remote control of autopilots and other chart plotter / MFD functions. Simple wifi setup.
It's both android and ipad compatible.
I wouldn't use my phone (samsung giii) as instrumentation, but it is a nice handheld repeater.
Lessons learned are opportunities earned.