Tool for comparing scales and chords.
It helps when composing.
Can be used to learn music theory.

Features:
- Without advertising
- Compare scales and chords.
- Display scales and chords on a keyboard / piano.
- Display scales and chords on a guitar.
- Preview (sound) scales and chrods.
- Free playing mode (sound mode).
- Save, open, export and share annotations.
- Convert piano scales and chords on guitar.
- Convert guitar scales and chords on piano.
- Alternate guitar tunings.
- Tunings for ukelele, violin, viola and banjo.
- Community (BETA): Share your files and download from other users.
- Left-handed guitar option.
- Support multiple screens.