iPhone

Here is a tool designed to help out with four of the more time-consuming tasks associated with military land navigation. The app is free to download from the iOS App Store, supporting GPS location and Distance-Azimuth calculations. If you like what you see, then use In-App Purchase to enable the other three modules Grid4Target, Intersection and Resection.

Designed for military personnel out in the field, Flash2Bang is an app for the iPhone and iPod Touch used to calculate distance based on an observed event and the following sound associated with that event. Since the speed of sound is affected by air temperature, it includes a temperature control that can also serve as a Fahrenheit/Celsius converter.