Read and generate QR codes for products, URLs, vCards, phone numbers, calendar events, and more with this fun and useful app.

If you're not familiar with QR (Quick Response) codes, they are mobile barcodes that you can encode with different types of information, and then use a smartphone camera, and QR code reader app -- ...

Barcode Scanner can decode a QR code of vCard contact information. So how do you go about making and displaying QR codes that your customers can easily scan and use?