[mywacaday]

No. 2 is interesting, our national lottery in Ireland has an app that you can scan the barcode on your ticket to check if you have won or not, at some stage they updated the app and the scan picks up the barcode even before you center it on the screen and tells you if you have lost/won instantly, I though it was my IT background that made me uncomfortable with it happening so fast, wonder what other examples like this exist where the result/action being too fast causes doubt with the user?

[GrayShade]

The Signal device linking feature is just as fast. It's partly a trick -- it will look for QR codes even outside the central area, so under good conditions it can get a read before you even get a rough orientation.