When an iPhone app asks for and uses your Face ID, does that mean the app has access to your iPhone's front camera? Or does it mean the app only receives a true/false value from the iPhone saying whether it is you or not?
Example of notification:
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1 Answer
The app does not get access to the iPhone's front camera when you agree to this popup.
The app is only allowed to use Face ID functionality. This means that it will know only whether or not the device owner is present. The app can decide whether that must be determined by Face ID, or if the user can choose to enter their pass code instead.
answered Mar 19, 2021 at 20:48
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4Note also that Face ID doesn't use the front camera anyway, it uses a dot projector, an infrared flood illuminator, and an infrared camera - see the Wikipedia article or Apple's explainer. Commented Mar 20, 2021 at 4:53