I am using this app since last 6 month. This app helps me lot. and it is important app specially now a days. this app provides mainly two facilities first is to know who is calling you, if it unknown number. second it also help you to search contact number of your friend or relative, whom you know.
I like this app because it help me lot what call is valid and fake. Accordingly it also help me to block the user who is unknown and fake to me.
Everyone, now a days receiving now and than call from unknown number, all should use this application for safety and security.
I recommend this application for all smartphone user, for whom it is easily usable.