Ipa resources are much bigger than android after installation??

my ipa is 80Mb, and 380Mb after installation, I unzip ipa and found that
resources.assets 60.7Mb
resources.assets.resS 210Mb
Look like textures are never compressed.
So... why is it so large??? PVRTC doest solve all these??

 

This has been my experience on iOS as well. I've never had a good explanation but I think it is because on Android, the APK is stored in its zipped form, but with iOS, parts (or all?) of it is unzipped at installation time, probably for performance reasons, or perhaps for runtime code-sign-checking reasons.

One other difference is that when you put a JPEG or PNG into Unity, Unity unpacks it to a texture format ready for delivery to the rendering hardware. In a native iOS program, that JPEG actually goes out with the binary and is unpacked at load time.

 

Thanks