Apple has paid out a total of $8 billion to App Store developers, Apple CEO Tim Cook said at Goldman Sachs' Technology and Internet conference yesterday .

Last month, Apple announced that it had paid $7 billion to developers for their apps. So in a little over one month, Apple paid out an additional $1 billion.

That's likely because of all the people who received iPads or iPhones during the holiday season and started filling up their devices with a ton of apps.

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