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Change app access to private data on iPhone
Change which apps and features have access to private information in Contacts, Calendar, Reminders, Photos, Health, Home, and more.
Go to Settings
> Privacy.
Tap a category of data, such as Contacts, Photos, Microphone, or Motion & Fitness.
The list shows the apps and features that requested access to that data, along with the level of access that you allowed.
Tap an app or feature, then choose a different level of access or deny access.
Review the terms and privacy policy for each third-party app to understand how it uses the data it’s requesting. See the Apple Support article About privacy and Location Services.