The application allows you to quickly and easily determine ranges with your Mil Dot Scope.No need to waste time fiddling with your keyboard to enter information into the application. The simple to use interface allows quick and easy calculations.Use the slider bars for larger adjustments and the plus and minus buttons to fine tune your input.WHAT DO YOU GET WITH PRO?No Ads!!!The Ability To Set Default PreferencesThe New Target Sizer FeatureI am always looking to improve my apps so if you have any suggestions please feel free to post them.If you don’t have any suggestions, but like the app please rate.