Facebook has four extremely popular apps. Its flagship Facebook app is quickly closing in on 2 billion active users, Messenger and WhatsApp have over 1 billion each, and Instagram has managed to attract 600 million users.
Facebook has four extremely popular apps. Its flagship Facebook app is quickly closing in on 2 billion active users, Messenger and WhatsApp have over 1 billion each, and Instagram has managed to attract 600 million users.