Whatsapp is surely a milestone in the history of software which changed the whole world. Whatsapp is the second best social networking after Facebook. Whatsapp is unique and amazing. The only app till date which allows instant messaging and even with the slowest Internet whatsapp can be used easily. Very easy handle this app, even a person who doesn’t understand English can use it, I have seen many people without the knowledge of the language still are very good in using whatsapp, though there are so many apps available in Appstore but still whatsapp is the best, most popular and instant messaging application ever made. One of the best quality of this application is its speed to send or receive messages without any errors. Whatsapp is one of the few apps in the world which doesn’t contains any advertisements. Absolutely zero error app. The latest updates will brought up even more features. One of the latest is video calling and voice calling.Anyone who has a phone even a non-smartphone user can install whatsapp in their phones.such a great app. The app has recently went with a lot of changes. Text, sound record the messages or photo sharing etc is soo easy and instant. Best app ever.