[NHAero]

Earlier this week in northern NH neither Waze nor Google Maps worked reliably. I don't know if this was an artifact of so many cars in a place where there usually are few? We had essentially no cell coverage the day before though, scouting possible viewing sites north of Pittsburg NH, and the apps weren't working then either. This is despite having downloaded and updated my offline maps in Google Maps.

Do these apps need cell coverage to work in normal situations?
Are apps such as Gaia GPS or OnX usable for routing in vehicles on roads (vs. backpacking on trails)?