SpeedDroid

SpeedDroid allows you to monitor important data such as current speed, maximum speed, distance and travel time. It also allows you to measure lap times on accelerating: just set the intervals by inserting in the boxes of the target speed to be monitored (eg. For 0-; 50 just enter 50 in the first box).

Once started, the application will start searching for a GPS signal: Note that if you are moving or indoors, it may take longer than normal.
Once attached the GPS, just enter the 3 ranges that you want to monitor and then press "Start": to facilitate the user, the stopwatch will start 3 seconds after pressing the start button, thus giving time to place the device where better it is believed. In any case the 3 seconds will be divided by 3 beeps followed by another which indicates the starting of the stopwatch (and therefore the start of recording of the performarce)

** IMPORTANT **
Do not lock the display, or change the screen during use, otherwise the GPS signal is lost and performance data will not be stored properly. If you want to avoid unintentional clicks, enable the auto-lock function in the setting. The screen will be locked once you click on "start" and you can unlock it clicking 3 times on it

You can also change the unit of measurement (km / h-Mph-m / s-fps) and view a history of their performance