I'm amazed the QR-reader situation on Android is still such a shit show. Include a QR-reader app by default on the phone you publish, give it a QR app icon and put it on the main screen. Anything else will not work for older people. Don't defer QR reading to the cam app putting a small URL icon at the bottom. Thanks: someone who had to delete three QR-reader apps from my mom's phone AND a "messages" app that wanted to become the default SMS-app and that plastered ads all over the phone.