A lot of navigation apps are already offline. Now the biggest navigation app is going offline as well! Google Maps published a couple months ago that they also developing an real offline map. Today is the day, they are publishing the offline map. Starting on their own mobile software Android. And later iOS will also get an update.
Update & tip: you can use Google maps offline, read here how it works.
I did a few larger travel trips now and when you’ve no internet connection and still try something to find can be hard. Specialy when you’re alone or tired from a long day or night traveling. Offline map Maps.me is my solution for this problem. You can download the map from the country on your phone. The most of the streets and big attractions are on it. So when I’m in a place with wifi is set a exact point on my map so I know where I’ve to go that day. The map will load offline and your location is easy to find.