Bow sight-in app?

[sdkidaho]

Have any of you seen this?

http://kck.st/1hNnUWb

Kind of a cool idea. I've seen bow sights that once you have the 20 and 30 yard pin setup that the next three can be dialed in automatically, so certainly the mathematics makes it possible to have this figured out.

 

[sdkidaho]

Looks like they're adding it for Droid now too.