Write and send messages to your friends and contacts from your iPhone.
Though you only get a few extra useful features, WhatsApp Messenger is an excellent choice for sending free texts across platforms, even internationally.
The messaging app is waving goodbye to its subscription, and has promised not to replace it with third-party ads.
A court overturns an order that imposed a 48-hour ban on the messaging app in a country where it's wildly popular.
The messaging app, which has added 100 million new users in the past four months, has experienced 50 percent growth in the past year.
Technically Incorrect: The Electronic Frontier Foundation's annual "Who's Got Your Back?" rankings see a vast gap between some tech companies and others.
CNET's Luke Westaway explains how WhatsApp has quietly become the most important app on his phone, and a better social tool than Facebook or Twitter.
The Facebook-owned messaging service retains its position as one of the largest platforms around, according to numbers from WhatsApp.
The new feature could help WhatsApp better compete with the likes of Skype and Viber, which offer both chatting and voice calling.
WhatsApp's cofounder claims the company is focused on promising the best experience for users, even to the detriment of interoperability with other services.
It's a big round number and all, but in the world of mobile messaging BBM remains one of the smaller players.