This app is a GPS-based Speedometer, showing the speed of the device it is installed on. The speed is displayed with an analogue gauge and as a digital value.
Additionally the maximum speed (since starting the app) is shown as a marker on the analogue gauge and as a digital value.
The gauge's scale is adopted dynamically and automatically adopted, so that there is no need for the user to do that manually.
The speed values can be shown in km/h or mp/h. This can simply be toggled by tapping the label of the digital display of the current speed value.
The top speed value can be reset by long-pressing the digital display of the top speed at the bottom of the display.
Please note, that this app uses a GPS signal to determine the speed of the device. Therefore it needs permission to access the precise location of the device and also it will not work (properly) inside a building.