[Otik]

I think Jolla has HERE maps as well, which would make sense given the history of the companies.

[dagw]

Yes and no. The default map app on Jolla does use the HERE maps data set, but doesn't support offline maps or turn by turn navigation. However the Android app is confirmed to work: http://www.thejollablog.com/here-maps-jolla-sailfishos/

[Otik]

Thanks for the clarification.