Also there are cases in the sheet music view where Yousician has your right and left hands playing in different keys. 'Wishing in the Night" in level 7 pop is an example. It's easier to site read if the hands play in the same key and the desired effect is achieved with accidentals.

Is there key signatures in piano path? The guitar path lacks key signatures all together. There's no indication of the key the piece is in, nor can it change then. You're left with your ears on this one. I would like to see the key signatures all in all, so I would know the scale I should play in, and as usual, the sharps and flats would indicate the notes that deviate from that key.

At the very least, if new key signatures aren't inserted into the scrolling sheet music at the appropriate points (which standard notation includes, so why not here?), then courtesy accidentals at the beginning of a new key would be very helpful.

This is unbelievably frustrating, and doesn't seem as though it's going to be changed anytime soon.