Scales & Modes is an interactive tool providing visual and audio references for diatonic scales and modes, essential in music theory. It allows users to view major and minor modes on the musical staff, access keyboard and guitar fingerings, and listen to scales note by note in any key. Additional features include violin and bass guitar fingerings available as in-app purchases.

Understanding diatonic musical scales and modes is crucial in Western music theory, but memorizing the vast number of scales can be challenging. Scales & Modes serves as a convenient mobile reference guide, offering a comprehensive collection of scales and modes, encompassing major, natural minor, and harmonic minor scales along with their modes.

Users can select a root note and a scale to display the notes on the musical staff, and listen by clicking "Play Scale." The app provides fingering diagrams for keyboard and guitar, with optional violin and bass guitar diagrams through an in-app purchase, enhancing the learning experience.