A fun fact I recently discovered when bored and "3D Touching" every app on my phone: Twitter.app has a built in QR code reader. It works pretty well, but I'll

A fun fact I recently discovered when bored and "3D Touching" every app on my phone: Twitter.app has a built in QR code reader. It works pretty well, but I'll concede it might still be crazy to presume guests have the Twitter app installed :-) edit: oh wow, as sibling commenter points out: the camera app detects QR codes now. neat!