TD Ameritrade Mobile : Best Overall. Robinhood : Best Free. Acorns : Best for Beginners. Stash : Best for Learning. Stockpile : Best for Your Kids. E*Trade Mobile : Best Big Firm. Charles Schwab : Best for Banking. Best Stock Trading Apps E*TRADE - E*TRADE Mobile, Power E*TRADE. Fidelity - Fidelity Mobile. TD Ameritrade - TD Ameritrade Mobile, Mobile Trader. Interactive Brokers - IBKR Mobile. TradeStation - TradeStation Mobile. Our list of the top five stock trading apps: TD Ameritrade Read review. E*TRADE Read review. Fidelity Investments Read review. Merrill Edge Read review. Charles Schwab Read review.