Your smartphone is full of surprises. Third-party programs take up space on your phone, and many are redundant thanks to your phone’s built-in capabilities.

QR codes are easy to use, if you know how to access the information they contain and have an internet connection.

The native camera app on iPhone includes functionality that allows you to scan QR codes and access QR code content like URLs without having to download a third-party app. QR codes can include ...