Take the trail with you in your pocket! AT Hiker is a complete companion to hiking on the Appalachian Trail, with tons of information that will help you on day hikes, weekends, or thru-hikes. -Hundreds of waypoints with photos and descriptions. -Interactive map with up-to-date location of the trail, plus many important side trails. -Interactive elevation profile shows your location and that of many waypoints along the trail. -Virtual trail registers at each waypoint: share info about places along the trail with your fellow hikers. Note: Continued use of GPS running in the background can dramatically decrease battery life.