Simple range finder

It is an application which displays the migration length from a its present location point.
It is a simple application which can be used to measure distance simply.
The following usage can be done.
- I would like to measure the distance which walked.
- I would like to measure distance, such as catch and the Hogan throw.
- When making the coat of a sport, I would like to measure distance.
All are only the easy operations which move to the position which wants to start and measure an application.