A QR code scanner app is required on your smartphone to scan shoes. Download a QR code scanner app from your phone's app store – many are free. Open the QR code scanner and give camera access. From a distance where the entire QR code is visible on your screen, simply point your smartphone's camera at the QR code on the shoes. Scanning the QR code will display the information encoded in it automatically. Shoes often have QR codes as part of anti-counterfeiting measures or for additional product information.