I'll tell you more, if you need routing for yourself then open-source OsmAnd has offline routing on Android and, probably, iOS. Info on public transport is not

I'll tell you more, if you need routing for yourself then open-source OsmAnd has offline routing on Android and, probably, iOS. Info on public transport is not perfect but more than usable where I am. That's in addition to the tons of information from OSM: from local businesses to features specific to maritime navigation, flying and horse-riding. The only thing that it misses is info on traffic load—which might be tricky to gather for a FOSS service while critically depending on the quantity of collected data.