Thanks Neilw that is exactly the answer I was looking for. Since it is so cold here in the Carolinas right now I plan to spend the next month or so experimenting with the phone and maps apps to be more proficient with them.
I too, like some of the other posters, am an older rider that has gotten by my whole life without them but see the benefit of them for dual sport exploring. A buddy and I many years (30+) ago got terribly lost in one of the national forests here and barely made it back to the truck on premix fumes. I was on a KX500 and he was on a CR250. We had to use a gas cap vent hose to equalize our tanks after i ran out of gas. I do ride alone sometimes now so the sharing of fuel is not an option then.
Thanks to all of the posters for all of the valuable information being posted on this subject.