Atos' professional version of the IMBScan application - IMBScan Pro - provides a very easy way of decoding USPS Intelligent Mail barcodes found on letters and flats. After launching the app and pressing the Scan Barcode button, simply aim your device's camera at the barcode, align the red line over the barcode and hold still for a couple of seconds. As soon as IMBScan Pro obtains a positive read from the barcode it will automatically display all the elements read. It is that simple! Notes: - If your iPhone does not have access to the Internet, the street address information will not be displayed. - This app is only recommended for the iPhone 5 or newer models. Older iPhone models may not successfully decode all barcodes.