An empty scene project in apk will be 8mb at least ! why?

i want to make some simple application by unity3d. the only problem is size of apk.
i tested to compile a empty scene to get know at least size, it compiled and give me a 8mb apk !!
why ? my asset is empty, my scene is empty too, i think its for .dll’s that is necessary to build project.
so there isn’t any way to decrease the .dlls ?

unity framework

so what does ?

Some body help me

unity has a lot of stuff packed into it for games. the framework itself is that big. If you just want something small where you don’t need all the bells and whistles I would look at using something else to make what you need.