I'm not fond of this "joke app" trend. App developers are now thinking "hey, Yo got $1.5M and a lot of publicity with a stupid app, we can get publicity with a stupid app too!", but they fail to realize that such apps, including Yo, only have 15 minutes of fame
in the best case.
In the worst case, you just spend hours, even days, working on a bad joke which no one finds funny.
It's also worth nothing that this submission got flagged off the front page.