For the confused (and I have nothing to do with this app):
There's an app called YO, and all you can do is send and receive YOs. So, all this does is when you send the username (HardBoiledYo or SoftBoiledYo) a YO, it will reply with a YO X minutes later.
Yo is, from what I naively understand, is a super simple app which you can say "yo" to someone. The analogy, I assume, is that someone so simple can still have a use?
And behold, here is a use for the Yo app...interesting...
There's an app called YO, and all you can do is send and receive YOs. So, all this does is when you send the username (HardBoiledYo or SoftBoiledYo) a YO, it will reply with a YO X minutes later.