Secrecy and privacy are two really big things in the limelight as of late, and the issues with online security as well as personal mobile security more than likely has a lot to do with it. What these issues have helped do is give rise to a number of messaging applications for mobile devices that can allow total anonymity for the users, like secret for example, or Whisper. Facebook is an entity that hasn't yet dared to enter into that space, and why should they have had a need to, they flourish on having all Facebook owned services tied to people's Facebook accounts. They have just recently separated messenger from the actual Facebook app, making it so that you need both applications installed on your Android device if you want to continue using the messaging service, Messenger of course is still tied to your personal information.
The word is though that Facebook has been developing another messaging service and application that delivers anonymous or private messaging features to users, to be a competitor for the likes of other private messaging apps. There aren't exact details on the app just yet, but it will apparently allow users to chat and message each other privately without having any sort of Facebook profile associated with the messages. Right now the new chat app has no name that we can tie to it, so we'll just call it NoFace Messenger for now.
A couple of other Facebook branch off apps have yet to launch onto Android, like Slingshot, so we may not end up seeing this hit Android either. Although a messaging service could be considered bigger and something that would be more widely used if available so we'd find it odd if Facebook decided to make the app exclusive to iOS even if only for a little while after launch. Facebook's Mark Zuckerberg has said that they aren't "afraid to move away from the real-name applications." This could be the start of that, although after so much scrutiny over their privacy policies throughout the last few years we have to wonder how many people could really look at an anonymous chat app from Facebook and think of it as truly anonymous. As soon as more details pop up about the app we'll be sure to update you on what, when and if you'll be able to get a hold of it on your Android devices.