Signal20 Jun 2014
The app that only lets you say one word

"People think it's just an app that says 'Yo,'" Yo founder Arbel told the New York Times. "We like to call it context-based messaging.” Effectively, Yo really is just an app that says 'Yo'. So why has it already been used four million times and attracted $1 million of investment?

The app that only lets you say one word