What’s app is the social networking app which is mostly useful app for humans and in this modern time all communicate is done from what’s app. This is most popular app in the world and now a days all android mobile phone have this app. This is to popular because of its cool features. By this app if we have internet connection we send a lot of text message and photos and videos to our friends which we want to send. In this app groups are also good features by this by sending a message in groups this would sent to all the group members easily. this app is going in all internet connection like 2G also and this is most popular app in the world after Google, Facebook and You Tube. This is most useful app for chat. I like it very much.