After reading your reply several times, I still don't understand what is it that you're looking for. I don't get if it is an app, a platform? A web service? a portal? etc.
For the record: An admin interface, administer an specific service that's allowed. You can't build an admin for other tweeter accounts, because you don't have control over those accounts. If you want an admin of your users, you first have to define what is it that you're going to gather from your users and then build the service to, in the end, administer this, via web or mobile app, but not the other way around.
Best of lucks!