Whether you are a beginner investor learning the ropes or a professional trader, we are here to help. TD Ameritrade, Inc. Instead, they are working to bring the full trading experience to mobile, including trade tools, advanced order types, detailed charting, complex options, cloud syncing, screeners, and much more. For beginning and passive investors, the TD Ameritrade Mobile app offers plenty of power for your needs. This is true of multiple brokers on this list. The app syncs entirely with thinkorswim, which is our 1 Desktop Platform pick in