Your smartphone is full of surprises. There's an app if you want to use your phone as a magnifying glass or scanner. Tap or click here for hidden apps on your smartphone and how to find them.

What is a QR code? A QR code (short for Quick Response code) is a two-dimensional barcode that can be read by your smartphone camera. QR codes provide quick access to product information, promotions ...

Chances are you've seen a distinctive black-and-white square plastered somewhere on a menu, box, or subway station. These are QR codes. The initials stand for Quick Response, and these unmistakable ...