I had been using this app for a long time, as it was one of the first free ones available. But today I tried to use it and a full sized ad wanting my geo location appeared. No thanks. Theres a competitive market for apps like this. You shouldnt have such intrusive ads that would cause someone to switch. Good luck, I know youre making millions a year on this (serious).
HarmyG about QR Reader for iPhone, v5.5