Well, those leaks were spot on. WhatsApp founder Jan Koum just announced (via Facebook, naturally) that the hugely popular messaging company has launched a web client that'll let users fire off messages from inside the desktop version of Google Chrome. As Koum points out, WhatsApp for the web is only an extension of the mobile apps you're already familiar with, meaning all of your lengthy conversations and exchanges still live primarily on your phone. Make no mistake: WhatsApp is still the epitome of a mobile-first company. Just to ram that point home, the (characteristically simple) setup process requires you to scan a QR code from the mobile app of your choosing. For now though, the client only plays nice with Android, BlackBerry, BlackBerry 10 and Windows Phone versions of the app -- Koum fingered "platform limitations" as the reason why iOS users can't join in on the fun.