It would be nice to have a chord bank that shows you all the chords that have been learned so far.
If a chord bank is not possible then it would be help a lot to have a list of all the chords that are taught in Yousician. This would make it much easier to reference while trying to memorize the names and shapes.
This would be especially useful for when you are picking chords and it does not tell you what chord the looks like in practice mode. You are unable to find what it looks like unless you go back and find the chord by looking through all the missions and guessing which mission it may be in. It is a very inefficient way just to find the shape of one or two chords.