Other people have mentioned phone apps so I’ll add that I got a Garmin device for hiking and it’s got road navigation. It’s better in some cases because the maps are downloaded so if you’re somewhere without service, it can still do navigation.
Obviously, they’re meant to supplement a phone for off-grid stuff like hiking, boating, etc. but the road directions seem perfectly fine. It knows where gas stations are. And some of their models are car-only so I guess they’re also used by drivers in areas with spotty phone coverage.
The downside is, obviously, that you have to update the maps and there’s no traffic details. But I just thought I’d mention it as an option. (You also don’t have to use their maps if you prefer OpenStreetMaps or whatever.)