How to use audio on iPad app

I just updated my Gospel library app on my iPad and I am just wondering how to use the audio that it says it now has, so that I can listen to the scriptures, etc.

Mine doesn't work either.
You see the greyed out triangle in the lower right corner of the app while you're reading scriptures? On the iPhone app that is white not grey, and pressing it starts the audio stream.
Must be a bug in the iPad app?

Turns out it works fine once connected to the Internet.
Must be an online stream, not downloaded to the device (not surprising really).