Needs service to work?!? – National Parks by National Geographic Review

Went to Mount Rainer park the other day, thought "I'll use that national park app I got", but no. Many of the features require phone service to work, particularly the maps to find where to go. You'd think that Nat. Geo. could include a built in map, but apparently not. Inside the park, there's basically no service, so the app was useless.
Review by Gregor Harrison on National Parks by National Geographic.