Alex Hern provides an update:
Zero-character messaging app Yo has apologised for getting hacked – and has hired one of the hackers to improve its service.
The app, which does nothing more than let users send each other “Yo’s” [sic], messages containing nothing but the word “Yo”, confirmed it was the victim of a hack on Friday morning. The attackers, three students from Georgia Tech university, could push messages to users’ phones, as well as read personal data from the company’s user database.
Read more on The Guardian.