When it comes to social networking apps, I think whatsapp is best application . very easy to use, easy to install, and data is fully secured . lots of smileys, and features like image insert, video insert, voice call are all awesome . now the whats app has launched its new feature as video call and it add the gold to the app. the app will never crash and stuck . design is simple and cool. every body can use it .and the best part is that you can use it all over the world, its not restricted anywhere on the world