Can you scan a QR code from a screenshot or photo? Yep, you can.

You don't need your phone to open a QR code. You probably already know how to scan a QR code with your phone. It's simple enough: just open the camera app, point your phone at the code, and tap ...

Lifesquare wants residents to input personal information about their medications into its website, then place corresponding QR code stickers where emergency responders can scan them with an iPhone.