I have two questions: First, is this the QR Code app that you were guiding me to? Second, does Google control the world's QR Code app usage or are there other QR Code generators and readers that have different sponsorship or controllers? In other words, does Google control QR Codes like it controls YouTube? I feel a need to know the territory.
Google doesn't have any say at all about QR or other barcodes; they're not involved.
The Scan app asks for your Gmail information so that it can link up to your Google wallet (if you have one) and automatically connect you to barcoded products in the Google Play store. But you don't have to enter it. I declined to enter my information and the app still works fine.
