How to check business news in the Stocks app.How to delete the Stocks app from your iPhone.How to check on individual stocks with Siri.How to manage Stocks notifications on iPhone.If you don't want to tap your way through the Stocks app, you can even ask Siri to check the numbers for you! You can check individual stocks and exchanges, see openings, highs, lows, volume, P/E, news, and see graphs from one day to two years. Apple's built-in Stocks app lets you keep track of everything in your portfolio right on your iPhone.