App takes some basic info from you, asks for your shot measurements from bulls-eye and tells you which way to adjust your scope and how many clicks :) enjoy!-Great for rifle shooters who need to quickly zero a new scope or get their current rig set up for hunting season.-App calculates the required adjustments while shooting from 25, 50 or 100 yards-Compatible with 1/4"MOA, 1/8"MOA, 1/2"MOA and 1"MOA scopes!