Hi guys,
My app’s normal apk size is 24MB. When I installed on an Android phone, total size is almost the same until Unity 4.2.2. I tested Unity 4.3.0 and 4.3.1 and found that app size is 24MB as it was but total size on the phone is 48MB, almost double.
Is this only happen to me or anyone else got this issue? Please help me! 
Same issue here.
As an example, I have a project ready to promote to Play Store with the following:
Complete size according to log: 9 MB (Including 4 Mb of DLL)
APK size: 11.6 MB
Size of the app Installed in device : 35 MB
size of the app installed in SD: 57 MB
The first question is: how much can be saved by stripping?
The second question is: Why the same compilation with Unity 3.5 weighed 8 MB ?
and the last and most important: Will I will able to reduce the size again to 8 MB?
After so many years supporting Unity, if I’m unable to solve this I will have to switch to a lighter engine.
Seems that Unity Android will only work for AAA games with realistic physics and dynamic lighting. But unfortunately has become unsuitable for casual and small games. It looks unnatural, since they are putting much effort on supplying great 2D tools lately.
Regards