Most of my students will know the importance of the Cycle of Fifths several lessons into their guitar studies with me.
It's a great tool for practicing the guitar, practicing improvisation, composing/songwriting and understanding how keys, modes, chords and their progressions work. If you write your own songs you'll find the Cycle (or 'Circle') of Fifths 'wheel' a very useful thing indeed :-)
Now software developer, Rand Scullard, has come up with a truly interactive online version of this important music tool and you can find a free copy here: Rand Scullard - Cycle of Fifths
- complete with a detailed 'User Guide'. Thanks to Carlos at Schwilly Family Musicians
for sharing this find.
More on how to use it at the excellent BeginnerGuitarHQ: https://beginnerguitarhq.com/circle-of-fifths/