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For hiking and biking navigation (tracking and routing) I use ViewRanger GPS Free Trial - Android
The app uses offroad maps on the SD card.
Routes, created with the PC, can be downloaded to the phone as .gpx files and then can be followed with ViewRanger.
The other way around, Tracks created and converted to .gpx with ViewRanger at the phone, can be uploaded to the PC.
Harry
Does this also work for gap in the car?

You can't. You can follow the route on the map.Not sure how to make it work with navigation though, haven't figured that out yet.