Whatsapp is one of the most popular and widely used app for the communication category. It was started by two ex Yahoo employees and now it has become one of the fasted growing apps. Much like other messaging apps whatsapp uses data connection or WiFi to send and receive messages and media. It has grown and improved a lot, for instance whatsapp had added calling feature and now it has voice calls. One of its feature, The broadcast list is the most used by me. Simply add the contacts to your broadcast list and send message to all of them at once rather than sending it individually.