0-100 km/h(0-60mph) Measuring

Do not want to measure the acceleration of the car?
It is impossible to use the stopwatch while gripping the steering wheel while concentrating on accelerator and shift operation. So I made this application.
It measures the speed with GPS and automatically measures 0-100 km/h(0-60 mph) or 0- 400 m(0 - 1/4 mile) of time.
Four measurement modes are installed.
Save results and display time, speed and distance on the map so you can look back later and post to Twitter.
Please fix the smartphone when measuring.

Explanation of each mode
・ 0-100km / h & 0-60km / h
It measures the time it takes for the traveling speed to reach 100km or 60km per hour.
-0-400 m & 0-1600 m
It measures the time it takes for the distance to reach 400m or 1600m.
・ TOUGE (峠)
Set the distance to the goal and measure the time it takes for the distance to reach that distance.

* It is assumed to be used in private lands and circuits. No responsibility can be incurred no matter what happens.