Satisfied with functions of the free version of OsmAnd thus purchased plus. But downloading speed of maps is dreadfully slow and it is still not ready after 12 hours from the payment. I tried repeatedly but failed every time. This situation has to be improved immediately. OsmAnd seems to be only the solution for Android to navigate in the turn-by-turn manner along with manually pre-determined routes. A GPX file is able to be imported in the app and the turn-by-turn navigation works well with the imported route on the pre-downloaded maps off-line. When the above issue is solved  I will rate this app with five stars.
April 07 2017