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.
I think its interesting to watch. It reminds me of the million dollar homepage. At the time I though it was a crap idea, and thought "who the hell would pay for that?". Interestingly, it got enough coverage in the tech sites, and news in general for the novelty value, that it worked.
The Million Dollar Homepage isn't a good example because it launched nearly a decade ago, way before the age of social media and the age of apps.
That was kind of my point. Webpages were the equivalent of apps just now, and the novelty value seems to be what drives crap ones like these.