From trail maps and guest tips to traffic conditions and dining options, national park visitors are upgrading from paper maps (still available at park entrances and visitors centers) to apps, where helpful information is at one’s fingertips. Many parks actually have their own apps, while other companies like REI and Chimani have created tools for maximizing a visit to a national park. Because cell service varies at each park, download any relevant apps before arriving at the park—do this even though many apps don’t require cell service to work. Take advantage of an abundance of information, by contributor Courtney Johnson, on national parks by clicking here.