Looktel’s Money Reader is a revolutionary augmented reality app for the iPhone, iPod Touch (with camera) and iPad (with camera) for the visually impaired that counts US dollar bills ($1, $2, $5, $10, $20, $50, and $100 bills). As soon as the app detects the bills, it starts counting. There is no need to place the bills in front of the phone camera in a certain orientation. The app detects the bill artwork and immediately recognizes the denomination.
Money Reader does not require an internet connection which makes it usable everywhere. This app is available for $1.99 (app description here).
A quick note about iPhone 3GS and iPod Touch fourth generation (from Money Reader’s description on iTunes):
“Note: If you are using an iPhone 3GS or 4th Generation iPod, LookTel Money Reader requires an environment with plenty of light.”