Whatsapp is most popular android application now. It provides very excellent global user base where you can chat with your friend easily. The registration process is very easy and less time consuming. You can backup your chat on google drive and save your chat while reseting your android or any other situuation. A very excelleent voice calling is also done by this mobile application. Every Notifies you when a message has been received by you. This application Practically or nearly eliminates need for a sms plan. Chat windows is also very attractive and pleasing.
Few CONS of this application is tht there is no desktop application made by the company. If you want to whatsapp on laptop then you must be go to your web browser. No video chat option exist in this application. No stickers facility. Your account tied up with a single device and phone number.
You probably have lots of friend and groups already on WhatsApp. Enjoy the fun on whatsapp and its free lifetime services.