Most brokers do have the technology to access their platforms via a smartphone app.
Remember, we aren't the trading platform. We just provide the trade suggestions and it's up to you to execute those trades as you feel suitable for yourself at a broker dealer such as Tradeking, E-Trade, Schwab, Fidelity, etc. We recommend Tradeking and their is more information on that at https://egoerwealth.com/tips/. We execute our own trades on Tradeking and their price per trade and tools are very good.