Apple is about to do a massive purge of the App Store (AAPL)

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Apple is cleaning up the App Store.

On September 7, while CEO Tim Cook is revealing the iPhone 7, Apple will begin to review apps and purge those that don't work from the App Store, the company announced on Thursday.

Apple's looking to zap apps that "no longer function as intended, don't follow current review guidelines, or are outdated."

Many of the apps that Apple will be removing are likely old and abandoned — perhaps a program developed years ago that doesn't work with up-to-date hardware.

Developers will have a chance to save some poorly functioning apps before Apple purges them. Apple will notify developers and give them 30 days to make a change. And if an app is removed, that doesn't mean a new app can take the removed app's vacated name.

However, apps that crash on launch will be immediately removed.

Apple has been making a lot of changes to the App Store to keep developers happy since Phil Schiller, a senior vice president, took over the division in December. Recently, Apple added a new way to bill users for subscriptions in which it takes a smaller percentage of sales.

In June, Apple said the App Store had over 2 million apps.

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