Whatsapp is very popular In India & other countries. The best part about this application is that it’s ad free. It has a very good encryption system which makes it almost impossible to decode messages from a lost phone.
Also the display pictures, chat fluency and call features are incredible and Bug-free. The recently introduced call feature works even at lower bandwidth and give a good quality conversation. The application is small in size when compared to the features that it offers and is light on the phone’s Ram as well. I simply love this application.