WhatsApp is one of the world’s most widely used mobile messaging apps, giving Facebook Messenger more than a run for its money. It is primarily a text chat tool which enables both private and group chats.
Whats App offers the ability to send and receive pictures as well as text messages but does not allow voice calls. You can think of it as an instant messaging platform running on mobile phones.
The main appeal of WhatsApp messenger lies in how it lets people send text messages on a smartphone without paying SMS fees to their phone carrier.