The app works in a number of scenarios. As well as recognizing people it’s seen before and guessing strangers’ age and emotion, it can identify household products by scanning barcodes. It also reads and scan documents, and recognizes US currency. This last function is a good example of how useful it can be. As all dollar bills are the same size and color regardless of value, spotting the difference can be difficult or even impossible for the visually impaired. An app like Seeing AI helps them find that information.