Estimated App Store size?

Discussion in 'App Store Business, Legal and Marketing' started by samdev, Sep 10, 2012.

  1. samdev macrumors regular

    Sep 16, 2011
    Whenever I archive an app, I notice that XCode Organizer always reports my app being
    10 MB more than what I see in Finder. After the app is release on iTunes, it's always the lesser amount.

    I don't understand why Organizer always add 10 MB more. It's not a very good estimate.
    It's 100% wrong in my experience. Makes me nervous the first couple of times, but now I just ignore it.
  2. Greencardman macrumors 6502


    Apr 24, 2003
    Madison, WI
    Yeah, its something to do with Apple compressing files later for the Store but I've never figured it out either.
  3. firewood macrumors 604

    Jul 29, 2003
    Silicon Valley
    The App store server encrypts your app's executable code before re-zipping it into a new ipa file. Encrypted code cannot be compressed very much, if at all. So the app ends up bigger.

    Thus, to estimate your app's download size, you need to look at the zip statistics after compressing your ipa, see how much it compressed your app's executable, and add that amount back in. It seems that the organizer uses a very conservative estimate at how much to add back.

    Try unzip -lv on you ipa file from the command-line to see the compression stats.

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