For families, Stockpile is great because it lets you buy and gift shares of stock. But the best-integrated banking and stock trading app in one is the Schwab mobile app. Use the Snapstock feature to learn more about the company behind any retail product with a barcode. You can also use your Apple Watch to receive notifications. This is true of multiple brokers on this list. Futures traders can use the mobile futures ladder. This makes StockBrokers.