If you’re like me and in the process of trying to move away from Google Maps, it looks like one of the better alternatives is currently available for half the usual cost. OsmAnd is an Android OpenStreetMap client which can be used for free but with some add-on features requiring payment (Android Auto integration, for example). I just grabbed the lifetime “subscription” (one-time purchase) for $35.
Mods, please feel free to remove this if it’s too much in the vein of advertising. I have no relationship to OsmAnd or OpenStreetMap other than having contributed edits to OSM occasionally.

I always understood that OsmAnd on F-Droid has all the features of the paid version.
In other words: if you’re clever and principled enough to use a FOSS-only store you get it for free. Let the victims of commercial OSs pay.
I might be wrong but I rather enjoy seeing it this way.
edit: apparently the difference has something to do with cloud features which I never use anyhow 🤷