Game of Clefs is an application for practicing sight reading. It's a musical test that uses musical instruments and musical scores to evaluate how well you can read music.

You will be given a musical test that will ask you to identify the note that is played on the instrument. If you answer the test correctly, you will receive an award and you'll be able to choose between four types of clefs (treble, alto, tenor, and bass clefs). You can also combine the clefs and play in one of the four possible modes (treble, alto, tenor, and bass clefs).

Game of Clefs Premium is the same app, but it has an extra mode that allows you to play with another player at the same time.