Its an useful app to find the details of any unknown number. One side this app also stores your info in it and other side shows the identity of unknown person to you. But this identity is real or fake it is tough to know. Because this app allow the users to edit their info, so the showing details of unknown number is true or fake is hard to say.
But in the corporate world it is useful for organisations, it stores the all detail of org and convey their clients who is on the other side.