Hello,
I am experienced PHP/MySQL developer, with strong background in mobile websites developement.
I can create a web app for you, following the given specification. The app will have a backend also, where you can add and edit codes and POP accounts. It all will be driven by a PHP and MySQL website, with HTML5/CSS3 frontend.
The "take picures from camera" feature is supported in iOS 6.0 and newer and Android ICS and newer.
We can arrange a Skype chat to discuss all the details.