RocketBook takes your handwritten notes and digitizes them. I have the RocketBook flip. I've been learning about the Zettelkasten method of taking notes, and thought, I already have a bunch of index cards. My Zettelkasten has already begun, I just need to digitize them. RocketBook makes these cloud cards which would be perfect but what about my existing cards? Enter the frame. Print the frame, print the barcode, cut out the barcode and glue it on the frame Place the frame on top of an index card and scan with the RocketBook app.