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=========================70% OFF FOR A LIMITED TIME=========================Circle of 5ths App is your music teacher, trainer and also can be a portable tool, book, reference, library, cheat sheet and your friend.New additions: 1. Circle of All Circle of 2nds, 3rds, 4ths (true 4ths!), 6ths, 7ths and of course, 5ths; interesting here is that the last key ALWAYS ends with C#/Cb Major or A#m/Abm.2. Bass and Alto clefs3. Drag and Drop practice key signatures and chord progressions4. Tones/Semi-tones marks on scales you can choose those marks on or off5. Compound intervals up to two octaves (24 semitones)6. Modes formulas with soundImprovements:1. Audio2. Contents navigation 3. Performance4. Full Screen in landscape mode - auto hide tab bar. NOTE: Unlock screen rotation and stay in portrait mode to use tab bar.5. Graphics6. Usability7. Enhanced user interaction8. Internal structure; stability, memory management, etc.9. Enharmonic key signatures