I’ve used garmin maps on orux & it’s OK, but the Locus UI is much better. For local use, here in Colorado, I found cotrex to be really good. Maybe this winter I’ll learn how to use mapsforge so I can make more useful maps for locus. For using mapsforge maps on the desktop I found cruiser.
kurvigor looks like a good app for road motorcycling, but doesn’t do it for dirt.