I was really interested by how much of Robinhood's UI is designed like a game, versus offering a way to really research or analyze stocks.
The act of buying a security should be easy, but the thought that goes into that decision is MUCH more important. They trivialize this aspect of investing in their advertising and app, which I believe is dangerous for the retail investors who don't know better.
That's all the app is. The purpose of the app is not to be your all encompassing trading platform. It's a simple way to buy and sell securities.