For now I went with Magic Earth. Main reasons: runs well enough and laziness, i.e. just download from the Aptoide store without thinking and done… . The native Pure Maps would in principle be preferable. Plan to come back in future. Many thanks for all information (and the map-work)!
I think the api that was missing is included in SFOS 4 so i believe at some point PureMaps will be available in the store. I hope at least.