Owners of Samsung's Galaxy S7 who have already upgraded to Android Nougat are still waiting for the promised Secure Folder app to become available to download officialy. However, its release seems pretty close now because earlier today it was leaked online. Those who tried it said it works, and even lets you add a Quick Toggle for it. Interestingly, when you first launch the app you are presented with a short tutorial showing you how to use it. In this tutorial, Samsung uses the outline of a phone that very much resembles all the leaks we've seen so far about the Galaxy S8. Take a look for...
Source: http://www.gsmarena.com/upcoming_secure_folder_app_for_nougatrunning_galaxy_s7_teases_the_galaxy_s8-news-23521.php