But the best-integrated banking and stock trading app in one is the Schwab mobile app. Best for Banking: Charles Schwab. The optionsXpress platform has been completely integrated, including the well-designed All-in-One trading tool, which is built into mobile apps. Pros Mobile apps now have all features, including international market data Streaming news alerts can be enabled on all your mobile devices, including Apple Watch Two-factor authentication available on request IdeaHub feature offers options trading ideas, updated throughout the trading day.