I recently found more info.
BackCountry Navigator An Android GPS app that runs on both Android smartphones and tablets. Currently ranked top among all paid apps in the Travel and Local category. Visit site ▷
MapOut Offline map for hiking, biking or as city map. Covering the whole world. Visit site ▷
ViewRanger USA Trails Guides & Maps for Hiking, Camping & Cycling. Plan, navigate and share your adventures. Visit site ▷
Komoot Better Planning and Navigation for Hikers and Bikers. From the deepest dirt track to the highest hiking trail. Visit site ▷
OsmAnd Offline Mobile Maps and Navigation. Global Mobile Map Viewing and Navigation. Visit site ▷
Remember, Effort or Effit, and peace be upon you then, and dust be off you, if you can manage it.
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See if that helps.