Biometric Unlock - Android
Face ID - iOS
Touch ID - iOS
We can use the biometric features of your device to keep unrecognized persons from opening the Blink app.
This optional app-opening feature does not affect any device OS settings, and does not replace the normal Blink app login process. Using Biometric Unlock prevents access to your Blink account if you let someone else use the device when it is running the Blink app. If your device does not have a biometric security feature, this setting has no effect.
Now, when you open the Blink app, it requests a recognition before showing itself. This will continue until you log out of the Blink app, or turn Biometric Unlock "Off" by tapping the toggle again.