Spyglass is an essential offline GPS app for outdoors and off-road navigation. Packed with tools it serves as binoculars, heads-up display, hi-tech compass with offline maps, gyrocompass, GPS receiver, waypoint tracker, speedometer, altimeter, Sun, Moon and Polaris star finder, gyro horizon, rangefinder, sextant, inclinometer, angular calculator and camera. It saves a custom location, navigates precisely to it later, shows it on maps and using augmented reality displays detailed GPS info, measur