QR codes are mobile phone readable barcodes which can store pretty much any alphanumeric data (website URL's, plain text, phone numbers, email addresses).
Most custom QR codes should be supported by Cheqroom, both in the web application as well as in the Mobile App. You can always try and scan one of your QR codes by using our Mobile App.
Once they have been uploaded and added to an item, however, they will be shown as a barcode, and not as a QR code, in the app itself.
Only QR codes that are generated by Cheqroom itself, will be shown as a QR code in the web application and mobile apps.