Barcode QR: Scanner & Generator is a free Android app developed by AppsMarvel in the Utilities & Tools category. This all-in-one scanner and reader app scans all 1D and 2D code types, including QR codes, barcodes, ISBN, EAN, UPC, data matrix, and more. It also allows you to generate both QR codes and barcodes directly from your Android device.

One of the best features of this app is that it works even without an internet connection. The app supports flashlight, scan history, and camera-only permission, ensuring your phone's privacy is not harmed. The QR code generator and barcode generator features are also very useful.

However, when scanning codes that redirect to online content, an internet connection is required. The app requires your device to have a built-in camera to function.

Overall, Barcode QR: Scanner & Generator is a great app for those who frequently need to scan and generate QR codes and barcodes. It is easy to use, has a simple interface, and is very useful in day-to-day life.