How do you adjust the volume using the ROKU app on an Android phone? I can't find it anywhere.
Do you have an actual Roku TV or a Roku device connected to a TV? You can only control the volume of a Roku TV (or a Streambar).
If you're referring to the official ROKU TV app from the Google Playstore, on the lowest buttons on the face screen...you should see 3 volume control buttons: Mute, volume down and volume up (These buttons will display the 'speaker' icon).
@Larry-K, right, if you're controlling an actual Roku TV or Streambar. Those controls won't appear if you're trying to control something like an Express.