Just a note that we have a new forum to contain discussions relating to the Wordpress plug-in which Daniel Persson originated and has been making great progress on. You'll find it under "Server-Side Solutions."
I haven't checked, but is there a video linked on the play store? Maybe have a couple images with a caption like "Scan the QR code...be logged in completely secure...no username or password needed." Then show a video of this in action. It doesn't have to be long, just like 10 seconds.