I have found this free navigation app based on OSM:
Works great for me!
Please check out yourself.
The app is also translated in Romanian:
I'm using LOCUS FREE with map of Romania downloaded in android phone (no connection needed, sometimes you even don't have GSM connection). app: https://play.google.com/store/apps/deta … ocus&hl=ro map: http://download.geofabrik.de/europe/rom … st.osm.bz2 unzip and store on your phone in the map where LOCUS is installed. Install on SD does not work from android 4 and next.