Useless messaging apps are certainly having a moment, but now, we are seeing a whole new level of unnecessary. First, we had Yo, which only allows you to send one word. Then Yo got hacked and died (or ...

There's a new iPhone app called Yo. It allows you to chat with a friend, but the only word you can use is yo. That's literally all Yo does. Yo App Raises $1 Million LINDA WERTHEIMER, HOST: Good ...

We can get any Yo user’s phone number (I actually texted the founder, and he called me back). We can spoof Yo’s from any users, and we can spam any user with as many Yo. We could also send any Yo user ...