Is there any way to store the biometric information/data points that faceid collects in your own database?
I know it's possible to allow users to log in using faceID on their own phones, however, is it possible to leverage facial recognition and make it a feature in my app?
For instance, allowing any user to log into my app on any iphone just by scanning their face...
Nope
To expand on anils’s accurate, but quite terse, answer…
iOS does not give apps access to raw Face ID data. You can certainly use Face ID in your app but you always have to go through an API [1]. You can’t build a system that relies on raw Face ID data.
If you’re curious about the background to this, Face ID is discussed extensively in Apple Platform Security.
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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[1] There are two approaches for this:
