Why is my iOS app so much bigger than what is shown in the editor log?

After building my iOS app and going into the settings, I find that the app size is 73.0 mb. But when I go into the editor log, I see this:

 Textures      16.1 mb     62.3% 
 Meshes        0.0 kb     0.0% 
 Animations    511.8 kb     1.9% 
 Sounds        5.1 mb     19.6% 
 Shaders       174.1 kb     0.7% 
 Other Assets  104.4 kb     0.4% 
 Levels        122.4 kb     0.5% 
 Scripts       41.9 kb     0.2% 
 Included DLLs 3.7 mb     14.3% 
 File headers  42.8 kb     0.2% 
 Complete size 25.8 mb     100.0% 

I manually compressed most of my textures using "RGBA Compressed PVRTC 4 bits" and that made a huge difference in the editor log, but there is still 47.2 mb being used elsewhere!

I realize there is a certain amount of space Unity uses outside of this, but from everything I could find, that only amounted to about 13 mb. I also am only using the free version without code stripping, but still I think that is a little ridiculous.

Is there anything I can do about it?