Songwriter's Calculator

The Songwriter's Calculator is every music theory tool you need in one app — built for songwriters, not music professors.

Pick a key. See every chord, scale, and mode instantly. Hear how they sound. Write better songs faster.

WHAT'S INSIDE:

CREATE — Choose a root note and any of 26 scales and modes. See the diatonic chords with piano and guitar voicings shown side by side. Generate progressions organized by verse, chorus, and bridge — each with harmonic analysis, vibe descriptions, and real songs that used them. Toggle between Roman numerals and Nashville numbers. Explore 24 solo styles on the fretboard — from BB King's box to Hendrix, SRV, Gilmour, Clapton, and Nashville session patterns.

IDENTIFY — Enter the chords you're already playing and instantly find what key you're in, what scale works, and what other chords fit. Don't know the chord name? Tap the notes on the piano or place fingers on the interactive fretboard and the app identifies it. Every result shows both instruments.

LEARN — Interactive circle of fifths with key relationships, diatonic chords, and one-tap navigation to the generator. Ear training drills for intervals, triads, and seventh chords with score and streak tracking.

TOOLS — Chromatic tuner with real-time pitch detection via your mic. Metronome with tap tempo, subdivisions (quarter through sixteenth), and time signature support (4/4, 3/4, 6/8). Capo calculator that shows every fret position and open shape for your target key. 10 guitar tunings including Drop D, DADGAD, Open G, Open D, Open E, and more — the fretboard recalculates automatically.

26 scales. 24 solo styles. 10 tunings. No account. No ads. No subscription. Just open it and play.

Built by a songwriter, for songwriters.