Robinhood
Robinhood launched in December 2014 and quickly became a favorite among younger people looking to invest without paying $7 per trade. Since its launch, Robinhood has amassed hundreds of thousands of users, and facilitated over $1 billion in trades, according to TechCrunch.
The app itself is stylish and simple, a big part of why it won an Apple Design Award. It makes stock trading cheap, intuitive, and mobile.
This past week, I tested out the app with a nominal amount of cash (Business Insider journalists are forbidden from playing the market by policy - so I'm donating the $1.26 I made to charity). It's ease of use was refreshing, and the only complaint I had was lag times while moving money around.
Here's what it's like using Robinhood, the app that wants to democratize stock trading.