Yes! Go ahead an download the Hiking Project Mobile app (hikingproject.com/mobile-ap…). Once downloaded be sure to enable location services if you want the app to locate you on the map in order to show nearby trails. You can download areas which are in downloadable packages by state. To do this go to the menu button in the upper left, click areas, then scroll down to find and download the state or country you're interested in. Once you have your state downloaded, even without cell service, you'll be able to see the downloaded line data and your location on the map. However, the app does not download and save the base maps to your phone. If you know you'll be taking the mobile app offline soon, you'll have an even better experience if you take a moment to scan around that area in the app. This will allow the app to save the background map as long as the app is open. The line data will display clearly whether you take this extra step or not, and you should always be able to see a blue dot indicating your exact location on the map.