IMO Interactive Brokers has a good mobile experience. However, IB is decidedly not meant for the young, millennial, small amount of investment principal, getti

IMO Interactive Brokers has a good mobile experience. However, IB is decidedly not meant for the young, millennial, small amount of investment principal, getting started with investing/trading segment that Robinhood has carved out for itself. So Robinhood's angle isn't just mobile first, it's mobile first for the segment of the population that expects such a product experience, who are going to grow their portfolios and trading activity in the coming decades.