Essentially it i a flashcard ap. I used it with both my girls to learn their notation. Just like physical flashcard without the deck. Easy to use in the car or anywhere. It tells you what the right answer is if you make a mistake. But the greatest thing is the time savings, because I can give my iphone to them and they can study it on their own, without me having to hold flash cards and call them out. One recommendation for later versions, incorporate sound so notes on the staff are audible, helping ear training as a side benefit.