Facebook Messenger – a software to communicate with users of the social network Facebook and friends from the phonebook. The software allows you to add users to the friend list, implement voice or video calls and create a group chats or video conference with many users. Facebook Messenger enables to send messages without the access to the internet by charging a fee as for a normal message according to mobile tariffs. The software also allows you to view files in the gallery during the communication and exchange of just taken photos, video or audio recordings in chat.