as a developer, this gets 5 stars
lovely material design! tho out of curiosity, which app will be using this interface as a fully functional app locker using a fingerprint? i've searched the whole play store and couldn't find a single one!
What this app do , can you make a apps for Android Marshmallow work on phones that have fingerprint scanner to lock apps , and to sign in into Google accounts Very material app , but need to have navigation bar color
A very good example of the user experience that can be achieved using the Digitus library.