GPS Hiker is a great and free application for outdoor activities. It supports GPS track logging, GPX file import/export and offline maps (Open Street Map, Open Cycle Map, MapQuest, Hike Bike and Custom Map Image) download and viewing. It also integrates with EveryTrail.com for you to search, view, download and upload trips. Camera, twitter and email features are integrated as well.While in the outdoors and without cellular service, you can display currently logging tracks and previously logged tracks made by other parties simultaneously on the offline map to make sure you are on the right track. Photos taken during the logging session can be displayed on the map and saved for later use. You can also follow the previously logged track to assist your navigation and check the mileage and altitude information for reference.GPS Hiker also allows you to search millions of trips from www.everytail.com, read trip stories, view trip pictures and download the GPX files of interested trips directly into the application for later reference. If you have EveryTrail.com account, you can also upload trips with photos to the site and view your own trips directly from the application. Even without an account, GPS Hiker itself is a great trip finder / viewer for your travel information reference.GPS Hiker is proudly field-tested at Mission Peak, Fremont, CA, USA.Features: GPS status (location, speed, heading, altitude) display. GPS logging & real-time trip information (time, distance, altitude gain/loss. ...) update. Tracks and marks are stored in the standard GPX format. Search millions of trips in www.everytrail.com, download GPX files of interested trips and save them directly into the application. Or you can manually add GPX files to the application via iTune File Sharing. Import GPX file you download from community websites and display its tracks and marks on map. Simultaneously display current track logged by yourself and imported track logged by others on map to make sure you are on the right track. Follow the track of the imported trip to assist your navigation. Photo Marks: photos taken during the trip will be displayed on the map. Title and description can be added to photos. Upload trips and photos to EveryTrail.com. Press-To-Find: long-press on the main map to find EveryTrail trips within the visual range of the map. Press-To-Mark: long-press anywhere on the main map to create marks for your trip. Multiple color and transparency options to display imported tracks on the map. Support online maps and offline maps (Open Street Map, Open Cycle Map, MapQuest, Hike Bike and custom map image). Trip Analysis allows you walk through the imported tracks in minutes and learn the related mileage, altitude and time information. Trail log to record your hiking activities. Interactive Altitude Profile Viewer. Universal Locate button to locate current location, last mark, current trip and imported trip. GPS switch allows user to switch off GPS, when not in use, to save battery power. Support WGS84-UTM, WGS84-DMS, WGS84-DEG, TWD67-TM2, TWD97-TM2 coordinate formats. Take geo-tagged photos with the built-in camera function. Email your trip to friends after the trip is done. TweetMark: Tweet your current location and last-taken photo (within 3 minutes) to Twitter. GPS tracking continues to work in the background while you listen to music or use another application.Notice: This application may continue to use GPS in the background, which can dramatically decrease battery life. You need to connect your iOS device with iTunes and enable the Application File Sharing feature to add GPX files and custom map images to the application or to retrieve the GPX files for your trips. To use the GPS related features, iPod Touch needs to connect with an external GPS receiver. This application is not intended for precise navigation. Please use it with good judgement and at user's own risk.