| Name | Icon | Description |
|---|
| Beginner | ◯ | Songs that have only I, IV, V, and vi chords. |
| Beginner II | ◯◯ | Songs that have only I, ii, iii, IV, V, and vi chords. |
| Intermediate | ▢ | Songs that have either a 7 chord (i.e., vi7), a vii° chord, or an inversion (i.e., V6 or iii64). |
| Intermediate II | ▢▢ | Songs that have an applied chord (i.e., V/vi) or an inverted 7th chord (i.e., vi42). |
| Advanced | ♢ | Songs that have a borrowed chord (i.e., iv) or that have an applied chord and an inverted 7th chord. |
| Advanced II | ♢♢ | Songs with borrowed chords that also have an applied chord or an inverted 7th chord. |