The Cool Converter App will allow the user to input a temperature in any one of the following scales; Fahrenheit, Celsius, Kelvin, and Rankine. It will then convert the other three scales for you. The Cool Converter App will let you use negative numbers and even warn you if you go below absolute zero! The background changes with changing temperatures, the buttons click, and the warnings will make your device vibrate, if it supports vibration. I hope you find this App useful, and please check out my other Apps. Thanks!