An offline/online PDF songbook with all song's we cover, all training programmes and theory.
I find it absolutely necessary for the understanding of the song to see the whole song in one piece.
The dynamic screen display is fine for practicing, but I will never understand the structure (like Verse - Verse - Bridge - Chorus - Verse ...) of the song.
Plus your favorites so we can play them offline
It would be good to be able to print out the tab for a particular song to be able to continue learning it off-line and make me less dependent on the screen.