I am facing trouble about packaging apk projects in unreal

I am facing trouble for packaging apk projects in unreal.If I create a blank project with no starter content,and package it as android(multi),the apk size becomes 96 mb!!!But why??There is nothing in the unreal file…so why my file size becomes too big???Therefore,if I open a Third person template in unreal and export it,the file size also becomes 1.6gb!!! I have tried all the ways to reduce file size in unreal,but it didn’t work…please anyone help me…