Here is an augmented reality app that lets you use your iPhone to scan the world around you to get distances, coordinates, and slope of anywhere around you. ScanEarth uses data from your phone’s GPS, gyroscope, and magnetometer to display data on your screen. The data is updates in real-time as you move your phone.
ScanEarth generates accurate virtual images and merges them with reality to display slope, elevation, distance, and other information for your target. You can always change which elements to show.[where to find it]