What GPS navigation smartphone app do you use other than the popular Waze?
I use Papago and Waze but the former stopped updating its map like two years ago.

Although Waze can be somewhat used as an offline map (loading the map while internet access is on), I still want something totally usable offline.

I also have PocketEarth but mostly as an alternative to Google Map and not for navigation. But I stopped using it when my iphone was retired (together with Papago).

I am now trying MapFactor GPS Navigation. I use the openstreet-based map. I kinda like it altough the response of the GPS location is not as fast as Waze or Papago. But the establishments you can find along your way is quite updated.