Lightning strike distance

I measure the approximate distance to the lightning fall from the point where you are now.
And I think if Re help you ensure safety of the body, such as the protection of consumer electronics products.

It's easy to use! Press the "Start" button when you see the lightning, just press the "Stop" button when you hear thunder!
You gave us the distance to the lightning point fall in the app side after!

■ Function
* Number of seconds counter (stopwatch) function
Starts to count the number of seconds each and press "start" and "stop" button to stop.

* Drop point distance calculation function
It calculates the distance in real time according to the count of the number of seconds, and displays.

* Recording function result
Record the results of the measurement and display.

■ Update History
2015/04/18 Ver.1.2.1
　*Modification of Android Version

2015/04/16 Ver.1.2.0
　*After " to record the results " button is pressed , the app has been revised a bug that become unresponsive .

2014/07/17 Ver.1.1.1
　*Modification of apps name

2014/07/16 Ver.1.1.0
　*Add the speed of sound adjustment function by temperature input
　*Fixed so as not to screen power OFF automatically

2014/05/29
　*Modification of description

2013/08/31 Ver.1.0
　*Released