Facebook Messenger comes in first at 139 million US monthly users. Facebook Messenger app allows you to instantly stay in touch with your Facebook contacts and includes fun add-ons like the ability to communicate with GIFs, stickers, and emojis.
Facebook Messenger comes in first at 139 million US monthly users. Facebook Messenger app allows you to instantly stay in touch with your Facebook contacts and includes fun add-ons like the ability to communicate with GIFs, stickers, and emojis.