A new mobile app helps the visually impaired count dollar bills with the help of a smartphone camera. IDEAL Currency Identifier can ID three generations of U.S. bills starting in 1993. Just hold the camera in front of the dollar bill and the camera captures it in a frame — without even pressing a button. The denomination is read aloud by a Siri-like voice within the app. At first glance, you might wonder how a visually impaired person could use this, but the frame is pretty large, so it’s easy to capture the dollar bill in the frame if you just wave your phone over it. Read the full story at Mashable.