I have made limited use of QR code by using apps provided by my two favorite airlines.
I was at a meeting recently where a printed agenda was passed out that had a QR code printed in black and white at the bottom of the page with an explanation that "You can sign up to receive text message announcements by scanning the QR code below."
I became interested. I went to the App Store and searched on QR code. 41 apps popped up on the screen. I was expecting a generally usable QR code app to show up, but was surprised to see what appears to be specialized QR codes for Graphics & Design, Utilities, Productivity, Business, Video & Developer Tools.
If I want to just read what was on the program, which one, if any, would I select? Are they all so specialized that I have to buy one of each if I want to become proficient in a wide variety of uses for QR code?
