GPS Speedometer is a free utility app that turns iOS smartphone into a functional Speedometer and route recorder.
This Speedometer app showcases a number of useful gauges needed when driving. It has numeric values for speed (km/h, mph or kn), cyclometer, compass, timer, average speed meter, route recording and speed trend diagram. It also comes with an accelerometer with variable start and stop speed, map-based location, anchor alarm, head-up display landscape view and more.
The app also comes with a widget for homescreen, save location and pedestrian navigation and GPX file export for sending data with Google Earth.