I can imagine that once QR codes are set up for each station in the classroom, these can be used instead of written out directions. I can have a website dedicated to each station and update the directions as needed. Students can use the iPads to read their directions.
This is a QR Code that should direct you to one of my websites. I think it will take you to the Westgate Database, but I can't be sure since I haven't downloaded the app just yet! :)