Map your trek
Perhaps one of the most simple navigation apps, My Tracks, helps you record your movement using GPS satellites (that includes unknown places as well) and then show it on Google Maps. You can either save the route on Google Drive or on an external storage. You can also use Bluetooth to pair your handset with any other sensor with Bluetooth connectivity. You need Google Earth to use all the features.
Also:u00a0liked Maverick GPS
Available on: Google Play
Price: Free