The iImprov-Chord/Scale Compendium is a user-friendly reference app designed to assist jazz musicians in making informed scale to chord choices during improvisation. With its visual and audio representation of the most useful scale options, this app serves as both a reference guide and an ear training tool.

The app categorizes 25 different chord qualities into three families: Major, Minor, and Dominant. When a specific chord quality is selected, the corresponding chord is displayed in standard notation alongside a key selection wheel. Depending on the chord, the app recommends 1 to 5 scales that are compatible. The Fast Forward button allows users to cycle through these recommendations, while the Play button enables them to listen to the currently selected chord and scale. To enhance recognition, the chords are displayed in close position (stacked 3rds), but are played using more practical voicings commonly encountered in playing situations.

Similar to other apps from Jazz Apps Mobile LLC, users can choose between bass or treble clef, as well as select the appropriate transposition for their instrument. Additionally, all scales and chords can be presented in any key, providing flexibility and adaptability for musicians of all levels.

iImprov-Chord/Scale Compendium is a valuable tool for jazz musicians seeking to enhance their improvisation skills and explore new chord and scale combinations. Its intuitive interface and comprehensive range of features make it an indispensable companion for any jazz musician looking to expand their musical vocabulary.