9 features you probably didn't know exist in WhatsApp

WhatsApp, the app that Facebook bought for $19 billion (£12 billion), is used by more than 900 million people around the world and has become one of the best ways to connect with people in different countries or have group conversations.

Unlike text messaging, WhatsApp uses a data connection which means that sending a message is essentially free, especially for those with unlimited data plans.

While the app is reasonably simple, there are features that many users haven't yet discovered.

Here are the top 9 "hidden" features in WhatsApp that everyone should know about and use.