# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2012-10-05 20:17:27 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/254314377946218496) PassBook iOS Question: Can you tell if an App has been launched from the link on the back of a Pass? I assume there — https://t.co/hOouh4pX