XChange is an IOS application that calculates how much money have based on rates of exchange. Do you need to know many dollars is equivalent to 100 euros? No problem! The XChange app can calculate that quickly. No fancy instruction and the interface is so intuitive, a 5 year old could figure out how to use it.The app also calculate distance and weight. So, go to anywhere in Western Europe and North America and don't worry about Peso's, Dollars or Euros. The XChange app will figure it out with a few button clicks.