QR code printer/reader? I run a small business repairing computers.  Sometimes I have very similar looking computers, and shenanigans ensue if the customer labels fall off or the serial numbers I record become detached from the computer in the course of repair.  

Is there an app I can use to print a qr code of plain text information about a computer/client/problem?  I believe my current printer is equipped with bluetooth, but I wouldn't be appalled if I needed to purchase a specialized printer (zebra, or whatever).
Check out an app in the Play store called 'Barcode Generator / Reader'.

And here's a link on how to use it: LINK