Unity iOS build app size is too big (1.7 GB), 30x larger than Android?

Question

I have a simple 2D game in Unity. Android build results into 55Mb APK file, while iOS build (after Archiving) takes the enormously huge size of 1.7GB.

From Build Report:

Uncompressed usage by category:
Textures      1541.8 mb  71.3%

So the most part of that size is textures. What are possible solutions to fix the textures size for iOS build?

Answer 1

In my case the solution was to change the compression method for the iOS build in Unity editor:

Build Settings -> Compression Method -> LZ4HC

It helped me to reduce the archived app size from 1.7 GB to just 84MB.