OpenStreetMap-based Android app for UK walkers and other countryside users, highlighting rights of way and showing contours from OS OpenData. Allows both online and offline use. In addition to navigation, walkers may share and download footpath issues (blockages, directions etc) and walking routes. Antifeatures: * NonFreeNet: The map data is OpenStreetMap-derived but it is downloaded from the Freemap server. OpenTrail does not currently send any personal information (such as your Google login) to the Freemap server. All data sent is completely anonymous. Location tracking (GPS) is used to find your location and to download nearby points of interest from the server. Server requests (to find all points of interest close to a given GPS location) are logged using standard server (Apache) logging; however they are not associated with a username or name.