MAPS.ME Lite is an app to view maps of any place in the world from your Android device, with no need for an Internet connection.
Keep in mind, though, that to access maps with MAPS.ME Lite with no connection, you first need to download them. All you have to do is find a Wi-Fi network (they are very large files) and choose which maps of which countries you want to save to your device. From that point on, you can always access the maps without an Internet connection.
With this version of MAPS.ME Lite, you can download maps of any country in full detail and geolocate yourself on them with your device's GPS. That said, among the things you can't do with this version are searching locations and sharing bookmarks.
MAPS.ME Lite is a very useful map application for anyone who loves to travel. Because it can be used without a connection, you won't need to use any data, and even better, not using the Internet also means you'll use less battery.