We're not allowed to install stuff on either device.
Again, I meet lots of people who don't have a PC/Laptop because they have the smartphone... but far more who stubbornly struggle on with the phone and the apps, despite having their own fully capable PC within arms reach.
Yet when I talk about things specific to me, it's suddenly not about me and I'm just the 1%er in the market?
I have a range of maps that display postcodes. No electricity needed. Not really reliable for navigation either way, though.
Depends which room... !
But even the best GPS is only so accurate (4m is the standard, I believe) and it can only show you your position. It cannot interpret the map or extrapolate local data and direct your navigation. It certainly doesn't alleviate the need for actual navigational skills and the increased callouts for Mountain Rescue for lost walkers who mistakenly thought otherwise only proves this, especially after their device gets broken or develops a fault with the service.