You can easily scan QR codes that are already on your phone

Android and iOS both have built-in tools to easily open QR codes from screenshots.
Stuff on MSN

How to scan a QR code on iPhone and Android

You’ll be a scanner in no time with this guide to getting the all-conquering QR codes ...
Digital Trends

Your Android phone can now share files with any iPhone using a Quick Share QR code

Sharing files between Android and iPhone has always been a pain, but Google is quietly fixing that. The company launched a new Quick Share feature that made Android devices compatible with Apple’s ...
Android Authority

Google starts rolling out QR code-based Quick Share transfers between Android and iPhone

Google has started rolling out a new Quick Share feature that lets Android users share files with iPhones using QR codes. iPhone users can scan the QR code through the Camera app, after which the file ...