It is super app and very usefull app.it is a heart beat of the human being.we cant live for heart beat simlerly we cant live for whats app.we massage to everyone those whose number set in mobile.it make life easer to all.we sand image to all and massage also video call also and voice call also.we write status and set a pic on our whats app. In Whats App privacy is there we hide all private message in WhatsApp. We click on archive and hide chat.at last we only say that whats app is heart beat of human being