How is iTunes store's top list updated?

Posted by KailZhang on Stack Overflow See other posts from Stack Overflow or by KailZhang
Published on 2010-05-31T02:51:55Z Indexed on 2010/05/31 3:02 UTC
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iphone

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itunes

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itunes-store

So now we can check top 200 apps in the store. But how is this updated - updated every hour? ranking is also calculated based on last hour's data?

Is there any nearly proved guess? Thanks.

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