Re: GPS for RVs - the Rand McNally Tripmaker (added discussion - Garmin Dezl)
Reply #75 –
I've been using the co-pilot chipset (SDcard) on a Magellan 7" GPS for over a year with good results. I can customize it as to type of rig and especially the voice it uses (some are better than others).
Co-pilot also has an app (at least for Android... not sure if it is available for IOS) that I've used but it's somewhat frustrating. Probably mostly because I have not yet figured it out completely. It's on my 7" Samsung Tab II and is easy to see with turn-by-turn instructions... and was free. 
Craig