This app developed using java in android studio platform. Free and without ads
Very quick at scanning, fast read text and easy to use
You can create your QR code for free, and try to test this app:
https://www.qr-code-generator.com/

How to use this app?
Just open the app, and allow your app to take picture & camera, barcode & qr code will quickly scan and recognize the information of Barcode and QR code.
And you can choose if you want to visit the site, just click on the button visit site, if the code contains a website URL, you'll automatically be taken to the site, if not you can just click on button scan new to scan another QR or Barcode.

Notes:
In order to use Scan, your device must have a built-in camera.
does not require internet connection. But when you scan the codes that redirect to online content (such as websites), you will need Internet connection