I've been using the old XZing barcode scanner. It's been a workhorse for almost as long as I've been using Android but with Android 10 and 11 I've had... odd issues like the app being stuck upside down.
There's heavy use of QR for Covid 19 related temperature and contract tracing check-ins here so having an upside down barcode scanner is a major annoyance, even if one can read upside down...
So my requirements are
- Runs reliably on Android 10 or 11.
- Scans QR codes.
- Ideally as simple as possible (I need to upgrade mom's phone), or I should have options to remove things like metadata and such. I just need a link or text out, and click on the link to open it in the browser.
- Free (gratis), no ads and on the Google app store.