Why are android packages so large?

My entire project folder is only 48mb in size and yet when I package it for android it takes up 1.2gb on my phone?

Why is it so large and why is Tappy Chicken so small when its packaged?

Some of us have already talked about it in this forum
https://answers.unrealengine.com/questions/141532/releasing-for-android-size-workaround.html#answer-203991

look for my comment to my answer i think you are suffering from what we just did.

And to answer your question tappy chicken for some reason has a smaller engine library within its apk its content is 13.5 mb all uncompressed in the final apk.

All of us are using a engine library that’s 60mb → 20mb compressed
they are using 43mb → 13mb compressed

Why? How? Magic? noone from unreal has really answered any of us till this point.