title: What contributes to the size of assets in an IOS App and how can I shrink this?
body: <p>I have an iOS app built in Xcode 6 which uses an Asset Catalog to store 71MB of images.  I have only includes the @3x images in my Asset Catalog to try and keep the size of the app under 100MB.   The only exception to the @3x rule is that I have included @1x and @2x images for the AppIcon group.</p>
  
  <p>All images are .JPG files with the exception of the AppIcon files which are .png files.</p>
  
  <p>When I archive and create an .IPA file, the size of the IPA is 117MB. When I open and look at the size of the Asset.car file within the .IPA I see that it is 130MB.  Contrast this to the Asset Catalog in the project which is 71MB.  I am pointing this out to be clear that it's not other compiled code that is taking up 40 MB.</p>
  
  <p>I would like to archive this app so that the file size stays under 80-90-MB if possible.   The IPA should stay under 100MB given the 70MB of assets but I would like to know how to accomplish this or what other steps I might need to take or review to see why I am getting 130MB of an asset file in the IPA for 70MB of images.</p>