I think the Daniel Johnston song ‘True Love Will Find You In The End’ in the app is a bit out of sync – the music and the graphical display of bars, lyrics and chords drift slowly apart, which makes it very hard to keep in time! I think it’s around an entire bar out by the end.
I’ve tried a couple of other songs today and I think they were OK, so I’m guessing it’s just that song rather than an issue with the app (or me!).