Currently my favorite OSM-based map and navigation app on Android is this one: https://play.google.com/store/apps/details?id=com.github.axet.maps https://play.

Currently my favorite OSM-based map and navigation app on Android is this one: https://play.google.com/store/apps/details?id=com.github.axet.maps https://play.google.com/store/apps/details?id=com.github.axe... Fantastic non-cluttered UI and offline maps that don't eat up my mobile data.