Samsung Galaxy Note 7 iris scanner: here is how it works - Android Authority
Iris Scanner for Android - APK Download
Android P adds new Biometrics API that supports iris, face, and fingerprints
Iris ID contactless biometrics integrated with Information Controls workforce management app | Biometric Update
List of all Eye Scanner (Iris, Retina Recognition) Smartphones
So android 10 beta on s9/note 9 has updated the iris scanner to support the biometrics api and can be used for apps that were updated (aka apps that work on pixel