My personal experience is that when now generation start using whatsapp is good to connect with friend and family which far for us but many people like me are very addicted of this app they every time put their eyes on phone and chatting on whatsapp which is harmful for eyes also my all time focusing on the phone people they don’t give proper concentration on other work while having food they are using whatsaapp they all the due to addiction of this app which is very harfuly to the people activity they connect to the other who are far away for us but disconnect us from the or beside(surrounded) people so addiction of this app is normal this day to every one now days in every andirod phone whatsaapp is avilabe I think make proper use of it but don’t be addicted of it .