One of the best application is what's app. I have been using the app for a long time. At first I really surprised and tell about this app to my friend as well as relatives. What's app is very useful and comfortable to all users. This app is very convenience for me. I chat more on what's app. This app has many features. One can easily to make a video or audio call to communicate. One thing I notice in this application that when internet speed is slow then this application work properly without any problem. I really prefer the app and I satisfied as well as enjoyed with this application. At last I thanks to what's app creator.