Scaleton is a focused guitar scale reference app for players who want to see scale notes clearly across the fretboard. Choose a root note, select a scale, and instantly view all playable notes in standard tuning. Tap highlighted notes to hear short local tone previews and quickly connect shapes, intervals, and positions by ear. Features: - 15 built-in scale types, including major, minor, modes, pentatonic, blues, whole tone, diminished, and chromatic - Full guitar fretboard mapping in standard tuning - Root note selection for all 12 keys - Clear note labels on in-scale frets - Tap-to-hear offline tone previews - iPhone and iPad support - Clean, distraction-free interface - No account required - No ads - No subscription - No in-app purchases Scaleton is designed as a lightweight practice companion for learning fretboard awareness, scale shapes, and note relationships without clutter.