WHATSAPP

WhatsApp is an application for smartphones.This app is used to talk through text messages or call your friends. It also lets you make video calls.
                             How does it work? 
First you have to download the app and after doing this, you have to put your personal information like your name and your phone number, then all your phone contacts that have whatsApp will appear, and you can send messages, audio messages and emoticons; or you can call them.
 



         
The main screen of whatsApp is separated in four parts: in the first part you have the camera to send your contacts photos and in the second you have all your contacts in order of how much you talk with them. In the third part you have the status of your contacts, which are photos or short videos of the day to day, which are cleared in 24 hours. And in the fourth and last part you have all the calls you have made. And in all of these parts, at the bottom, you have the button to create a new group.

In groups, whoever creates it is the administrator, although this administrator can make other members of the group administrators also. The administrator can delete people from the group, and you, as a member, can leave the group or delete it.