But when I said internet, I meant "while using the GPS". My GPS units have maps that came with the units, for all of America, Canada and Mexico. The only time I would ever need the internet, would be if I wanted to update them, one time operation only. I will NEVER be in a situation, while out, and see the popup "no internet connection" which I have seen with app programs.
Preloaded maps are preloaded maps, whether you are using Backcountry Navigator on an iPad or a Garmin Oregon hand-held GPS unit. I have both. The iPad lives in my Jeep so I have a *big* screen to look at when driving (actually, when stopped at an intersection trying to decide which way to go), and the Oregon goes with me when I step out of my Jeep to go hiking. With both, I pre-load the maps off the Internet onto the unit at home before I go out into the field. I don't even turn on the cellular or WiFi connection on the iPad when I'm in the field, because if I do it sucks down battery juice faster than the cigarette lighter power adaptor can provide it.
I know the "app" programs that you are talking about, the free ones that come with the phones, and they have nothing to do with what anybody here is talking about. They're worth exactly how much you paid for them.
BTW, I have since switched to Gaia GPS as my offroad in-Jeep app for the iPad, because it's easier to select regions to download into the GPS that way and they seem to download faster than with Backcountry Navigator. This program runs on the iPhone also, and also has an Android version. The main reason I still use the Garmin Oregon once I step away from the Jeep is because it is much more power thrifty than the phone. Even if you turn off the cellular, wifi, and bluetooth radios on the phone, the fact that it has a much faster CPU and bigger/brighter display makes it suck down battery juice much faster than the Garmin. The Garmin will generally last all day on a pair of AA batteries and then you swap a new pair in. The iDevices and Androids... you're lucky to get four hours of GPS use out of them.