Facebook messenger application is best messaging application on google play store. It directly connects your facebook message list when you Log in it. It is only used for chatting purpose. I am using it personally for few years and till now I have no complain , I am enjoying it. Latest updated version of this application has many features such as you can set up nicknames, secret chat, chat colours and many more which makes it more intresting than before. However, it size is large to download but works well and impressive.people who has not used it yet, should use it. Really impressive application.