Scales Pro is an educational app that utilizes the circle of fifths to help you learn scales and chords. With its intuitive interface, you can easily navigate through the app by swiping to rotate the wheel and choose one of the 12 tones of the chromatic scale. Tap on a tone to hear its sound.

The app offers color-coded fretboards and keyboards, making it easier to visualize and understand the scales and chords. It provides 12 scales for guitar, including major, natural minor, harmonic minor, minor pentatonic, major pentatonic, and blues scales. For piano players, the app offers six different chords: major, dominant 7th, minor, major 7th, minor 7th, and diminished chords.

Whether you're a beginner or an advanced musician, Scales Pro is a valuable tool for learning and practicing scales and chords on various instruments like acoustic guitar, bass guitar, and piano. It's a free app that can be a great addition to your educational and reference resources.