I had the audio for CSB as well as the book itself, and when I played CSB audio it would sync with the words in Verbum mobile.
It doesn't do that anymore.
I see a note that it "won't do this on mobile" but it USED to do it
I bought a Greek narration and I'd like to spend my commuting time on the long bus ride to learn better pronunciation, having the words synch with the audio helps greatly.