If you ever wanted a way to send messages from your smartphone to others – friends, relatives, business contacts, colleagues, and anyone else for that matter – Whatsapp provides you a simple, cost-effective way to do just that. You may also send images and videos to other phones – be it an iPhone, Blackberry, Android-based phones, or Symbian phones such as Nokia.

Using WhatsApp is free for everyone, except for iPhone users who’ll have to pay US $0.99. For other smartphone users, it’s free to use for up to one year and then there’s an annual billing for US $1.99 per year. WhatsApp is linked to your phone number. It’s simple, efficient, elegant, and does the job for you.

Over 1 billion messages are sent using this app each day. The app boasts of being the number one app on the Apple App Store. It enjoys 10 million downloads on Android alone. Further, it’s used globally and across 750 networks.