address | label | name | notes:Serve never navigates — it hands each stop to a maps app. We suggest Organic Maps (already picked for you below): it's free, needs no account, doesn't track you, and once you've downloaded the maps for your area it works with no signal at all — rural routes and dead zones included.
Two downloads, both plain: first the app, then — inside the app — the maps for your area, before you head out. Without the area maps on the phone, there's nothing to navigate with offline.