This app is more of a necessity for me and many others I know. Download is free and so is setting up an account. To think of it now, I cant recall the last time when I sent an SMS. Anyways getting back to whatsapp, it seemed like overnight whatsapp became so popular that everyone started chatting on it.
The prerequisites are internet connection and a phone that can support this app. A profile pic, setting up a status, syncing contacts and youre good to go. I can share photos, videos with people in my contact list. The group creating feature is also stunning. The new features that these guys keep enrolling. I just love it alot