Hi, this is a great app for the iPhone it works perfectly. It tells you your money amount. Another words a money ID. It has no buttons in the app or anything. Just open up the app and hold it over the 1, 5, 10, 20, 50, or 100 dollar bill and it tells you what it is . It is fast and needs no focus . It only works with US money as of now. It will work in low light conditions. The app is called Looktel money reader. See link below to it. http://www.looktel.com/products Sign, JP ( Joe Plummer) joeplummer@xxxxxxx