[Daho0n]

Android has had a buil-in QR scanner for years. Looking in this thread at least OnePlus, Pixel, Motorola and Samsung has it in the default app. As far as I know it is part of android.

[srg0]

Huawei has QR scanner built-in in the gallery app https://consumer.huawei.com/en/support/content/en-us00326153...

I believe that its built-in app also has a QR scanner in HiVision package, but it requires to accept a scary privacy agreement.

Firefox for Android embeds a QR scanner in its address bar: https://support.mozilla.org/en-US/kb/scan-qr-codes-firefox-a...