Facebook began to include in the social networking application shortcuts to other of its services such as Instagram and WhatsApp.
The buttons that lead to these apps appear in the social network menu, just below the link to the personal account.
The shortcut to WhatsApp works only on Android. The button for Instagram appears on all mobile versions of the social network.
Facebook admits that integration is ongoing. But in the case of WhatsApp, it says it's just a test.
The resource also shows how many friends the user has on the social network, in the case of Instagram.