The Circle of 5ths Master HD App

Today's app is the Circle of 5ths Master HD app:

​Circle of 5ths Master HD (http://eunjae7.wordpress.com/apps/) App unlocks complete enharmonic key signatures that help give an understanding of the circle of fifths and other related issues; works well with the other two versions of Circle of 5ths with multitasking between the three apps; explore and discover hidden musical keys; series is a comprehensive library for all musicians, composers, music teachers, lecturers, professors, students at all levels and music enthusiasts; includes various musical components such as key signatures, intervals, scales, triads, and more; designed to help develop aural perception including relative pitch and perfect/absolute pitch; use as a reference as well as a study and teaching guide for training of the ear; learn, develop, and maintain musical knowledge and sharpen the ear; (iOS 7.0 or later).