From iMore:
In a news release on its Developer website, Apple has announced that apps will be required to list privacy details in the App Store starting on December 8, 2020. The company originally announced these changes at WWDC back in June.
Users will now be able to see what kind of data apps collect and if how that data is used on the app’s page in the App Store.
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See Also: How to Stay as Private as Possible on the Mac (via Computerworld)