Reducing the Apk File Size of the Build

Textures 0.0 kb 0.0%
Meshes 0.0 kb 0.0%
Animations 0.0 kb 0.0%
Sounds 0.0 kb 0.0%
Shaders 0.0 kb 0.0%
Other Assets 0.0 kb 0.0%
Levels 8.7 kb 0.2%
Scripts 0.0 kb 0.0%
Included DLLs 3.7 mb 99.6%
File headers 8.1 kb 0.2%
Complete size 3.7 mb 100.0%

How to remove Included DLLs size. This is a empty Project.

Those dll’s are basically Unity mono stuff. If you have Pro you can use the stripping levels to try to cut them down, but that will only go so far.