Did you mean slick or slick?

Sygic has one disadvantage: it is not free. Back in the days when I was using Android, I found a very good and free offline navigation solution called NavFree. It had its own downloader for offline maps per country. The maps were based on OpenStreetMap but neatly compacted, one file per country rather than the usual set of tiles. I do not know if it's still around and if it still works the same way or whether it would work on Jolla.