I think, Guilhas is right. If there would be such an app, it would be dangerous both to those, who sell it and to those, who buy it. What for? If you can search well, you will find something. For example, I used fake ID when I was 19 for entering the club. One of my Holmes told me about a site with fake ID shop reviews. I chose ID Hurry and bought one. It was 2 years ago and no one even suspected, that ID was fake - non cops, non security guys. I still use it to buy stuff from the internet. If you are looking for a fake ID, it can be your option.
The review I was talking about
:
http://fidvendors.is/