deepest darkest Oxfordshire. Where the phone Sat Nav is totally useless.
I tried a Which? - recommended SatNav phone app recently and was gobsmacked that it wouldn't work at all
without an internet connection.
It makes sense to have connectability
available because people want traffic updates etc. (or they want to break the speed limit between speed cameras and risk other people's lives).
But to make a GPS app so it refuses to work at all
without a connection is insane and irresponsible - it potentially puts people at risk when they get caught out by assuming it will work anywhere.
GPS is the only system that works literally anywhere on the surface of the planet - that's the whole reason why the military invented it; and older apps like Navigator (free) will find your position 100% of the time - entirely in passive mode - the on-board maps may be a little out of date but will still be incredibly useful when you are stuck.
No matter what Which? says is "best", everybody should keep a passive GPS app on their phones for emergencies.