Creating iPhone Apps Generator i.e creating iPhone applications automatically.

I am working on an application to create Magazine in iPad- iPhone. The template is ready but now I want to make an automator on web interface where user who wants an application for his/her magazine can input the contents and details required by the template of magazine and gets his .ipa for magazine done. Something like this 13 tools does.

I tried to find the working of 开发者_StackOverflowthese tools but found nothing. I wish to know if its possible to create this kind of tools? Is there any Apple script to create some kind of bash file or plist file that can help to do this?

Please suggest what approach can be followed to create such tools.