Whatsapp is one of the most famous messaging application in the world.it is messaging application which runs in androids, Apple iphones, blackberry, microsoft lumia and in some of the nokia’s feature phones.it has amazing features like hiding status from others, hiding profile picture from others, hiding last seen.it has whatsapp to whatsapp calling feature.it provides sharing of pictures, music, videos, documents etc.it can be easily downloades from playstore in android and from the official website of whatsapp for other phones.