US Patent 9551980 Solar timer using GPS technology

In a GPS-equipped device such as a smart phone or a tablet computer with a compatible operating system, a useful dynamic display of directional and timing information is provided based on GPS data obtained through conventional means processed according to computational modules or applications stored on the device. These displays include a solar timer, a compass dial and other date, time and location-based information. Underlying the displayable information is a database of information that is processed with input from an accurate compass employing a calculated reference line based on two time-separated GPS readings and a direction parameter.