Suggestion: stay away from them. Opening the browser and typing in a URL followed by a short code is way faster than getting all participants to download a QR code reader.
QR code reader? I believe most native photo apps can read them now, it shouldn't hurt to have both the URL and a QR code
Not on Android v8 as I just checked.
I have Android 7.0 with EMUI 5 - it has built in QR reading, but it's automatic rather than being able to tell it to look for a QR code, which can make getting it to read a bit problematic.
Stock Android still doesn't. I think Samsung also has this through "Bixby Vision"
Basically, why not have a QR code in addition to the URL displayed?
Uggh.. don't get me started on Bixby... it's like a modern day Clippy... "I see you accidentally pressed the hardware button to awaken me the 10th time. how can i take over your screen today?"
Why not just download an app to remap it? I remapped mine to screen rotation lock.
I don't understand why a QR code reader is not more deeply integrated into mobile OS'. It used to be one tap away on Windows Phone (under the search button), and I used it quite regularly. But due to bad discoverability I guess most people didn't know it's there.
The standard iOS camera app has an integrated qr code reader, but it seems not to be documented anywhere.
I don't use iOS but their QR reader functionality in the stock camera is excellent. My Pixel recently got it in the stock camera but it's an extra swipe and click away compared to the iOS one which makes it both harder to discover (I was told about it by a colleague) and more effort to use.
Are you aware that apps and webpages can use the camera and a library to read QR codes?