Features include the ability to choose from 6,000 U.S. stocks and 24-hour trading five days a week. Robinhood currently offers 24-hour trading in the U.S., allowing trades to happen outside 9:30 a.m. Robinhood won't offer U.K. stocks to begin with but will look to add them as it brings more products into the platform. Jordan Sinclair, Robinhood's U.K. chief, said he expects 24-hour trading to be popular, as it will let users trade on market-moving news. Dan Moczulski, U.K. managing director of EToro, a rival stock trading platform, said the arrival of more competition in the retail trading market marks "an exciting time for the industry."

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Persons: Rafael Henrique, Robinhood, Jordan Sinclair, Sinclair, Tenev, Dan Moczulski, Moczulski, Vlad Tenev, We've Organizations: Getty, Robinhood's, CNBC Locations: U.S, British, England