mobile app to help people to identify currency

Thanks to MyBankTracker , we know the launch  of IDEAL Currency by the U.S. Department of Education. It is a free application for Android devices that helps the blind or visually impaired identify U.S. paper currency.
"After downloading and launching the app, simply hold the phone’s rear-facing camera over the bill, and it will voice-identify the denomination without the need to press any buttons. The app does not require an Internet connection to work."

There is more apps about this usage :
"EyeNote, introduced last year and downloaded 8,000 times so far, is a free app that provides the same service as IDEAL Currency Identifier, but for iPhone, iPad and iPod Touch. LookTel Money Reader is another currency-recognition app for Apple devices that supports other currencies, such as the Euro and Canadian Dollar, as well as a wider range of languages ($9.99 per download). "