When I was in college I worked cleaning houses too. Not only is it hard work, but you need to be fast too.
I have never understood why people hire house cleaners through an app like this. Over time you end up with a fairly intimate relationship with the people who clean your house. They know a lot more about you than most people do.
My wife and I have had the same people cleaning our house for over five years. I would not want strangers cleaning our house, even if it were cheaper.