Inspired by Jacob Colliers' (a multi grammy award-winning artist) use of Negative Harmony in his music I created this app to be able to more easily find and use this musical concept in my own music. The negative harmony app consists of 2 pages (Scales and Chords). The first page "Scales" gives the option of selecting a scale or mode and then tapping on a key inside the circle of fifths to display the selected combination. In doing so the app will display all of the notes inside the scale/mode and their negative harmony counterparts while also colouring the selected key and displaying the axis (the blue line separating the circle of fifths into two parts) to visually represent the musical theory behind the app and the negative harmony concept. The second-page "Chords" is made available after selecting the key and scale on the first page. Here the user is able to choose the desired chord type (major, minor, suspended, augmented...) and select the note from the chosen scale/mode which will then display the name of the selected chord, the notes inside the chord as well as the negative harmony chord name with the notes inside the "negative" chord. Chord notes displayed RED are non-diatonic (any notes or chords that are not native to the key).