A free program for Android, by Secure Mobile Applications.

QR Code and Barcode Scanner Professional is an app for scanning QR codes and barcodes for free. You don’t need to pay to use this app, you can download it for free. 

This application is easy to use and is very efficient. You can scan QR codes and barcodes in a few seconds. The app has a variety of tools that you can use to scan and generate QR codes and barcodes. There are short classes that explain the functions of each tool in detail. This application is developed by experts for its storage is the minimum achieving that this free QR scanner in English occupies very little space in the memory of its users so that it can be downloaded at any time without waiting a long time.