Facebook Messenger is a free mobile messaging app that lets you communicate with friends on Facebook and with your phone contacts. You can use Messenger to send instant messages, share photos, videos, audio recordings, and create group chats. You can also use Messenger to react to other users' messages and interact with bots. Messenger is available as a standalone app for iOS and Android devices or integrated within the Facebook app for Android devices. Specific capabilities vary according to the user's device and geographic location. Facebook launched Messenger in the summer of 2011 after acquiring a messaging app named Beluga.