IDEAL Currency Identifier (Free. Android only) This Department of Education app is designed for people with vision problems. The app uses advanced image recognition technology to read a bill and provide an audible response indicating the bill's denomination. Users must enable text-to-speech, after the start-up banner load the user must dismiss it, on first use allow 30-45 seconds to load and update, and it can have problems with mangled bills. It can identify Identify the following notes: $1 (1963 - present); $2 notes (1976 - present); $5 notes (1993 - present); and, $10, $20, $50, and $100 notes (1990 - present). Just position the bill under the phone's camera, does not need an Internet connection.