Infinity for Windows Phone is a ballistics calculation system based on the work of Ted Almgren and William T. McDonald. The system calculates ballistic information for over 3900 bullets allowing for changes in various parameters such as Muzzle Velocity, Temperature, Pressure, Altitude, and more. The trial version of Infinity is limited to comparing 2 bullets and will only calculate data for Sierra .224 bullets. The trial version displays ads, the full version does NOT. For support Contact : support@sierrainfinity.com ***Note Infinity supports calculations in English units, Metric units, MOA (1,1/2, 1/3, 1/4, 1/8, and Mils) settable on the options menu.