@gritnot OsmAnd from F-Droid if you're referring to a Google Maps or Apple Maps alternative. Its a bit less accurate in some places, but just check your country before using. Works 100% offline, as you just download your country (or state if you're in the U.S.) and then can put in any address and you're good. Used it in the past and while its not stellar in my area, I compared it side to side with Apple maps and it got me where I needed to go, albeit a few minutes slower and a few miles more.