It is a very good application for Instant messaging like messanger. I have using it from long time .I use it for Downloading new movie and other PDF Document of channels or Messaging any channel. In this app you can also make your own channel and post any things, like images, videos, PDF document etc.
It secure the data of a channel and it's author .you can make your unlimited subscriber as like YouTube from your good contents. It is also good for reading , you can join or leave any channel which of you not want , and if you want to join a channel then you will have to search the channel name and then you can join. It has a various client app. It is a very good application, It has its own website.