I have tested many face recognition android app, but this app is working perfectly, in addtion, they are providing face anti-spoof function which can prevent photo, video, and 3D silicon mask attacks, I am following their github repositories they are doing good work.
Please check below github link, and if you are satisfied with that, please give star!!

https://github.com/MiniAiLive/MiniAI-Face-Recognition-AndroidSDK