IObit Applock - Face Lock - the Developers are very tried when I wanted to release this app. It is equipped with a unique AI which is able to recognize faces, which makes this app unique. Of course in this there are failures, but they have taken care and have introduced several additional levels of protection, for example you'll be able to additionally add a pattern, or a simple pin code, so even more protecting the data on your smartphone, well, or a separate application.