Can the iPhone Roku app turn the TV on and off, and adjust volume?
I asked Roku support chat this question. They said yes it can, and they said to set up the iPhone as a remote in the stick's settings "add remote." Well, I can't make it work. I don't think it can be done. Can it be done?
It can turn on/off and control the volume of my Insignia RokuTV. (Volume & Power Control)
It can wake up my Roku devices connected to non-RokuTVs but cannot control their volumes or Power them on or off. (No Volume and no Power Control)
The Android Roku Remote app was updated to remove those controls not available to the user, and show these controls when they are available. I am not sure if they also did this to the Apple Roku Remote app.
Short Answer - Yes, if you have a RokuTV. No, if you have a Roku device (Streaming Stick or other) and a non-Roku TV.