MapCircle is a simple app that allows you to visualize distances by displaying a map with an overlaid circle or donut of a specified radius. The circle view is useful when you want to see everything that's less than some specified distance from some location. The donut view is useful when you know that something is "a mile away" (or some other distance), but aren't sure exactly WHERE it is & want to try and guess its likely location. The donut itself represents the region of uncertainty and ma