I think this fits here. Here or business/finance. It's mostly hypothetical at this point.

I recently finished the first iteration of what will be a fairly useful utility-type app that I'll call App X. I think it would be a very powerful tool if there is some way to easily distribute extensions for it, made in some kind of extension-making app that I would make. Does Google Play have some sort of distribution system for doing something like this? A cursory glance via Google turned up nothing.