The u-center GPS evaluation App provides a powerful graphical tool for evaluation and performance analysis of the GPS receiver built into your Android powered mobile device. It is a cost-free App that supports u-blox as well as other embedded GPS receivers. Features include visualization of all visible GPS satellites including signal strength and position, heading, altitude, velocity and GPS time-of-day. It also allows you to check NMEA messages from the receiver, as well as view basic information about each satellite such as azimuth, elevation and status. The App also allows you to visualize GPS traces superimposed on actual maps.