The only problem is, many of those QR code-reading apps for the iPhone just don't do a good job. That prompted me to sift through more than a dozen QR code readers to find some of the best. I came ...

One way to do that is with TOPDON’s CarPal Diagnostic Tool. It is an easy-to-use code reader that connects via Bluetooth to an app you install on your phone.

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

Already an affordable option, right now you can save over $25 on this diagnostic code reader from trusted brand Ancel.