Overall, users have a rare chance to interact with other traders, gain knowledge from their perspectives, and possibly enhance their own trading performance through social interaction with these slots reviewstrading apps that offer social trading features. Best Trading Apps for Mobile. A popular mobile trading app is TD Ameritrade Mobile, which offers a variety of investment products and an easy-to-use interface. Also providing real-time quotes & sophisticated charting tools, TD Ameritrade Mobile is a good option for traders who need to access extensive market data while they are on the go.