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 clefs
3. Drag and Drop – practice key signatures and chord progressions
4. Tones/Semi-tones marks on scales – you can choose those marks on or off
5. Compound intervals up to two octaves (24 semitones)
6. Modes

Improvements:
1. Audio
2. Contents navigation
3. Performance
4. Graphics
5. Usability
6. Enhanced user interaction
7. Internal structure; stability, memory management, etc.