My entire content folder (all my game assets and blueprints) is 4.5mb in size.
Why would my APK be 52mb?
Engine resources and code, your assets are just addition to that
The engine takes up that much space?
My game is extremely small, it only utilizes the GUI to produce a simple 2D game.
Androids max file size is 50mb, there’s no way unreal takes up 90% of that. It would make building for android on unreal completely useless as you couldnt fit anything else on top.
Why dont you open apk with jar explorer (or whatever it use) and check what takes so much space
I never did find out the answer to this question.
If you do work out how to strip away the unnecessary items from an APK, could you post here and let me know?
Thanks.
After finding “what takes so much space” how we know what we can delete or not? Where is documentation about this? How to discard unused content and modules?
Very sad, this kind of questions are all hardly answered… 
I have bookmarked your question… I have to fight this problem soon when I get near to finish my game, if I found something I’ll comeback here.
regards.
Hi @Glenn1990
Digging into the forums I found some tips from other people experience:
See here:
And here:
One of these guys has taken his game down to 35MB 
See it at google play:
I’m not tested anything yet, came here to share first 
Regards,
piX
Please see the official documentation posted in this thread: Why are android file sizes so big? - Mobile - Epic Developer Community Forums