Sound volume on Scoutly is controlled by Media Volume in Android phone. To adjust, press the volume up/down button on your Android phone. You should see the Media Volume icon (1). If you do not see it, you are adjusting other sound options such as ringtone, try to tap other icons such as (2). It will bring up the Sound & vibration setup screen. You select the Media volume (3) option and change the slider bar to adjust the volume.