WhatsApp and Gmail join the 1 billion user club

Gmail becomes the sixth Google service to cross the 1 billion barrier, while WhatsApp becomes Facebook's second most-used app

Facebook's WhatsApp messenger and Google's Gmail have both crossed the 1 billion monthly active user milestone, meaning that one-seventh of the world's population now uses them both.

The two apps join Facebook's 1.59 billion monthly active users (MAU), as well as Google's other 1 billion or more MAU services: Google search, Chrome (both mobile and desktop), Google Maps, YouTube, Google's Android and therefore also Google Play.