[thomaszander]

> It becomes trvial []

I'm looking forward to you helping solve this problem then as I have the Android app, but can't use due to lack of downloadable maps.

I have a couple of places in the offline storage, which still works, but if I go to a new place I can't use the app, downloads never start.

[petre]

For downloadable maps you need vector tiles and a mobile rendering engine like OSMand and other mobile apps use. MapgoxGL maybe, but that one uses their service, I don't know if you can serve local data. You could with a local webserver.