Here's how you can download the Barcode Scanner app free for Android devices.
1. Go to the Google Play page for the free app Barcode Scanner.
2. Tap the Install button.
Here's a description of Barcode Scanner:
"Scan barcodes on products then look up prices and reviews. You can also scan Data Matrix and QR Codes containing URLs, contact info, etc.
Also share your contacts, apps, and bookmarks via QR Code."