It is an application that displays a map withconcentric circles.
This is the free version with ads.

Seems there are those who have been used to measure the distancethe golf course, it was also compatible with yards that hadhope.

Has the following functions.
Fixed point fixed at the center of the concentric circles.
Fixed at the center of the screen to the center of the concentriccircles.
Automatic, the radius of the concentric circles can be selected in10m ~ 500km.
(I do not see the number when the line is on the screen.)
View satellite photos.
View traffic conditions.
Displays the address of the center of the screen.
Display center of the concentric circles, the coordinate values​​of the center of the screen.
Button to move the center of the concentric circles.
The ability to move the current position the center of the screenusing the GPS feature of the terminal.

★ Note
Since it is no longer concentric fact becomes high latitudes, Iwill show the error.
Please use within 1,000 km from the center of the concentriccircles.

Please fill in the comments section request.
I correspond as much as possible.