Quick Scan QR Code Reader. This is also a convenient app for reading retail barcodes, though it usually requires you to watch a video advertisement before seeing results. Scandit Barcode Scanner.

If you're using an Android device, here are five of the best QR code scanner apps to download.

One of the most popular third-party Android utilities — Barcode Scanner — with over 10 million Play Store installs has been outed as malware.