How to know if someone blocked you on WhatsApp WhatsApp now lets you add short video messages to chats

Sunbird - the sketchy iMessage for Android app - just shut down What began in early 2009 as a small project by two former Yahoo engineers to replace SMS struck a chord, acquiring a quarter-million users in its first year and growing to 400 million by the end of 2013. While it’s far from the only game in town, one app that’s soared to the top of the digital food chain is WhatsApp. Luckily, WhatsApp made our list of the best iPhone Apps and our infamous list of the best Android apps out there.

After all, apps designed for communicating with others don’t do you much good unless enough folks are using them. Yet, many of those fell by the wayside as they failed to achieve the critical mass of users needed to make them useful.

In fact, the Apple App Store and Google Play Store are both littered with apps that promised to be the next big thing in mobile communications.