Modern smartphones provide a high sophisticated camera and a high resolution display. Therefore, they can be used to enable various application scenarios for 1D and 2D barcode recognition as well as barcode presentation device. The device positioning against the barcode allows innovative interaction: e.g., additional product information or “rail information” on paper tickets. In the future, the challenges lie on applications that are “easy to use” with one-click: e.g., book auctions with one key press. Beside usability approaches, the technical challenges cover fast and robust algorithms under bad light conditions, different angel orientation and parallax calculation.