The Roku mobile application is a free app for iOS and Android players that turn your mobile player into a control center for your Roku streaming device. The Remote feature of the mobile application permits you to control your Roku player using your mobile.
Accessing the remote control-
When you launch the Roku mobile application then choose the Remote icon. Using the arrow buttons- You can use or configure the remote control in two ways-
To change between the, tap the control's icon from the top of the mobile application and choose the Remote option.