It's easy to adjust the volume for incoming messages in your app!
Open the Relay app, and tap on the speaker icon near the top of the page.
The following screen will allow you to adjust the volume level of incoming messages to your phone.
You can also adjust the volume by following the steps below:
Open the Relay app on your iOS device
Press and hold the talk button in the app
While still holding down the talk button, adjust the volume on the device using the physical volume buttons on the side of your device.