For offline maps, I've used MapsWithMe / http://MAPS.ME/ http://MAPS.ME/ for years. It's based on OpenStreetMaps data. Comparing them, the Nokia solution offers

For offline maps, I've used MapsWithMe / http://MAPS.ME/ http://MAPS.ME/ for years. It's based on OpenStreetMaps data. Comparing them, the Nokia solution offers: * offline routing, though it's in the MAPS.ME beta * turn-by-turn directions * public transit * (online) live traffic info * share directions from a computer