some advice on how it works

[pdxdjazz]

I just like having the chords, lyrics and playback all in one place, when I'm learning a song that's new to me. After several times through, I've memorized the lyrics and chords anyway.

Then check out the apps I suggested:

There are apps out there that will scroll full (user-entered) lyrics and chords at a specified tempo.
Look at OnSong, BandHelper, SetListMaker.
Some can simultaneously play (user-provided) audio.
(even tracks exported from iReal Pro)

I'm interested in the link you offered, but it's not functional any more.

The link has been fixed.
)BOB