The standalone app may also have health-focused features to connect users suffering from the same illnesses to create a kind of support network, a US daily reported.
According to the report, the app will allow people to use pseudonyms so they can have discussions about topics "which they may not be comfortable connecting to their real names".
Whether the standalone app will connect to Facebook's main page and users' account is still not clear.
Earlier this year, Facebook CEO Mark Zuckerberg announced that releasing new standalone apps would be a top priority for the social networking site.
Facebook has already launched an ephemeral messaging app called Slingshot. The Facebook Messenger app has already been downloaded over 500 million times on Android-based devices.
Facebook-owned Instagram has also released a standalone private messaging app called Bolt.