Here We are talking about a WORLDWIDE messenger . WHATSAPP . the company stated that its the worldwide number one messenger for people contact and social chat .
PROS: The pro of whatsapp is its seamless messaging(chating) with internet. Its capable of handling Messages, calls even in EDGE(2G) Network. Messaging platform is unique and its features are awesome. It can send Group messages even Broadcast without a Glitch. The concept of internet chating is awesome and it has been improvised on android platforms as well as ios and windows. It can hold up your address book to monitorize and separate the contacts with whatsapp availability and even stated the online chatters.
CONS: As compared to all other chatting apps whatsapp always be the king but it need some updation i.e. Group calling, Group Video chatting, sending multi format files and as well as sending images without losing its resolution and quality.