To select Celsius, touch Menu, Settings, and select between Celsius and Fahrenheit. The app should remember your selection until you change it.
I would like to say thank you to Ruediger Puch and John Rambo for their assistance with the localization of the app. Without you guys being willing to assist me, I couldn't have done it.
If you do experience any problems with the app, or something isn't right with the localization, please feel free to email me.
Unlike other applications in the market, I promise that I will NEVER include advertising for an application that only took one evening to write.