Darwin Wallet enables blind and visually impaired users to quickly recognize paper money. It uses the phone’s camera to detect currency denominations for US, UK, Canadian, European Union, and Australian bills. Simply hold the bill in front of the phone’s camera and the app will speak its value.Darwin Wallet is an open source app published under the GPL. If you are a developer, get involved! The source code is on GitHub:https://github.com/matthill/darwinwallet