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How do QR codes work? The checkerboard patterns taking over the world, demystified. Go to https://Saily.com/veritasium and use the code ‘veritasium’ to get a...
A video that explains how information on a QR codes is stored.
I have an F-Droid app called IWS QR that let you choose that, it’s also let ypu choose the error correction and other options too.