The app is compatible with the HTC One X, HTC One X+, Samsung GALAXY S III and Samsung GALAXY Note II, which run Google's Android operating system.
Facebook also updated its iPhone and iPad applications to let people keep using its chat feature even when they are doing other things, such as reading friends' updates.
And the company said it's also bringing its "chat heads" feature to its Apple apps. It's called chat heads because friends' profile photos pop up when they send you a message.
Unlike with Facebook Home, iPhone and iPad users will have to stay inside the Facebook application to use chat heads.
An update is already available in Apple's App Store, but Facebook says the chat heads feature will roll out in the coming weeks.