Facebook: How to read your inbox without the knowledge of the sender(Available free for Android mobiles)

Many times you want to read a message in the inbox on Facebook but you can not because you do not want to know the sender that you have seen. Some - perhaps from personal experience - wanted to find a solution to the problem in question. 
By applying Privy chat, clck here to see it in google play, which is only available for Android you can read all the messages in the inbox on Facebook, without automatically displayed in the sender ... extremely frustrating "read" that is responsible for a host of quarrels and misunderstandings ... 
All you need to do is to install and connect to your profile on Facebook. 
Available free for Android devices and mobiles.