Them being on a mobile phone takes out at least the bad point of Q-Cats, which was the need for an extra device. While I don't fully understand the appeal of th

Them being on a mobile phone takes out at least the bad point of Q-Cats, which was the need for an extra device. While I don't fully understand the appeal of these codes (it's not particularly difficult to just google for the restaurant, instead of scanning its code), they are already popular in Japan.