What is WhatsApp?
WhatsApp is a social networking and instant messaging (IM) service with over 200 million monthly active users. Its main drawing card is that it works across multiple platforms: iOS, Android, Windows Phone and even BlackBerry. This means that users can send iMessage or BBM-style messages even if their friends’ devices aren’t on the same ecosystem. The App itself costs 99c on iOS and 99c per year on the other platforms.
WhatsApp does also support calls in some areas, but all this does is place a normal call through the app instead of your regular dialer. The call still goes through your carrier and you still pay normal call charges. Read More