I guess the developer got bored and tried to play a prank on all of us but I did like the idea and downloaded the app just for fun so did 5 million others!
The idea is how fast can you milk a cow and compete with your friends because supposedly the cows will be motivated to give more milk. My score was 32 seconds and I actually developed a better way of milking. It is pointless yet funny in some way. How often do you come up with an idea like that? You can laugh a bit with this app.