This article will let you know how to download and share your QR code on any medium.
Via the Blinq Dash on Desktop:
Login to dash.blinq.me
Click into "Cards", and click on the business card you want to get the QR code of
Click "Share card" at the top right of the screen
Click "Download" next to the QR code that pops up in the drop-down menu
Mobile:
Open up Blinq App, Tap "Send"
Scroll down
"Save QR code to photos"