Its very convenient to practice note tame adding with this app whenever and wherever you want. I have a hard time reading notes, and this app helps a lot.
The only suggestion I have is to display the sound of the note when I make my choice. Right now the sound of the current note comes out when I chose the previous note, and it can be quite confusing.
Juliaplayspiano about Music Tutor (Sight-reading), v3.1