Why Unity 5.x's apk is bigger than 4.3 ?

I have read this question, and I know change the Divice Filter can reduce apk size, but lose some intel divice user in the same time.

But I still have no ideal why unity5.x’s apk is big while unity4.3 the last version I used is small.
unity4.3 have no divice filter question?

another question is have any good way to find how much player use intel device?

Please correct me if i’m wrong- When a APK is created all the library’s the project is using must be put in the APK as well. Unity 5 has more features than 4.3 did, therefore more library’s, therefore more space. But being no android tech nerd I may be wrong, so please correct me if i am :smiley: