Mar 31, 2020 · TD Ameritrade has the distinction of being our pick for the best overall stock trading app in our 2020 Online Broker Review. In fact, TD Ameritrade has two of the best apps for stock trading as it StockClock Review - Is This Stock Screening App Worth It? Mar 04, 2020 · Introduction To StockClock. StockClock is a market news and stock screening app for iOS and Android mobile devices. The app offers one of the cleanest interfaces for monitoring the day’s market news, tracking large price movements, and viewing candlestick charts.However, StockClock lacks many of the features that technical day traders need.