The social messaging app WhatsApp has reached 1 billion monthly active users.
This means that WhatsApp, which is owned by Facebook, is even more popular than Facebook's own messaging app, Messenger.
WhatsApp handles 42 billion messages and 250 million videos every day, making it the most successful social messaging app in the vast majority of markets.
There are a handful of markets where WhatsApp is overshadowed by local giants, however.
WeChat, Kakao Talk and Line are the most popular mobile messaging apps in China, South Korea and Japan respectively.
WeChat recently pressed forward in the Hong Kong market in fact, where it has just launched its mobile payments service WeChat Pay.Â
