Keys, chords, scales, 24 solo styles, ear training, metronome, tuner & capo — all in one app. No subscriptions. No ads.
Free 7-day trial · Then one payment, yours forever
Create progressions, identify what you're hearing, train your ear, and keep time — all without switching apps.
Pick a key and mode, generate chord progressions with song references, view piano & guitar voicings side by side, and explore 24 solo styles on the fretboard — from pentatonic boxes to BB King, Hendrix, and Nashville session patterns.
Add the chords you're playing and instantly find what key you're in. Don't know the chord name? Tap it out on the piano or fretboard — every result shows both piano and guitar voicings side by side.
Interactive circle of fifths shows key relationships at a glance. Ear training drills intervals, triads, and seventh chords to sharpen your hearing.
Metronome with tap tempo, subdivisions and time signatures. Chromatic tuner that listens through your mic. Capo calculator for any key.
Choose a root, scale type, and mode — from basic major and minor to Dorian, Mixolydian, and beyond. Every suggestion shows the Roman numerals, a vibe description, and real songs that used it. Hear any progression played back on piano or guitar with one tap.
You've got a chord progression you like but don't know what key it's in. Add your chords one by one and the app analyzes every possible key match, ranked by probability. Tell it which note feels like "home" to narrow it further. Works with majors, minors, 7ths, sus chords, and more.
Ear training drills for intervals, triads, and seventh chords. Hear the sound, pick the answer. Your score, streak, and accuracy tracked in real time. The interactive circle of fifths shows key signatures, relative majors and minors, and modulation neighbors at a tap.
A metronome with tap tempo, quarter/eighth/triplet/sixteenth subdivisions, and 3/4, 4/4, 6/8 time signatures. A chromatic tuner that uses your mic to detect pitch in real time — works with any instrument. And a capo calculator that shows every position where you can play open chord shapes in your target key.
Not just box positions. Player signatures, modal extensions, and advanced navigation systems — each one shows exactly which notes to play and why.
Pentatonic positions, blues scale, major pentatonic, chord tones. The building blocks everything else is built on.
Each box shown in its exact fret range with context — which players favored it, how it connects to the next position, and why it matters.
Actual note choices of the greats — not approximations. BB King's 6-note box, SRV's connected zone, Hendrix's major/minor hybrid, Nashville session patterns.
Add one note to the pentatonic and change the entire sound. Dorian for Santana, Mixolydian for the Allman Brothers, Lydian for Satriani.
Superimposed pentatonics over different chord types, country "outside" half-step shifts, diagonal 3:2 runs, and blues scale extensions with the 9th.
Blue dots are pentatonic tones. Green dots are added color tones. Purple dots are blue notes. Notes outside the active zone dim to 15% opacity. Every style includes a description, playing tip, and the artists who defined it.
No subscriptions, no recurring charges, no "premium tiers." Buy it once, own it for life.
| Feature | Songwriter's Calculator | Typical alternatives |
|---|---|---|
| 24 solo styles (BB King, SRV, Hendrix, Nashville...) | Included | Not available |
| Cross-instrument display (piano + guitar) | Included | Pick one |
| Chord progressions + song refs | Included | Separate app |
| Key finder from chords | Included | Separate app |
| Reverse chord identifier | Included | Separate app |
| Interactive circle of fifths | Included | Separate app |
| Ear training | Included | Separate app ($) |
| Metronome + tuner | Included | 2 separate apps |
| Capo calculator | Included | Separate app |
| 14 scales & modes + 9 tunings | Included | Varies |
| Pricing | $9.99 once | $3-12/mo each |
| Ads | None | Most have ads |
Yes. Every tool works without an internet connection. The tuner uses your device's microphone, the metronome runs locally, and all music theory data is built into the app. No server calls, no loading screens.
24 different ways to visualize soloing patterns on the guitar fretboard. Five pentatonic box positions, player signature patterns (BB King, SRV, Hendrix, Gilmour, Clapton, Nashville session), modal extensions (Dorian, Mixolydian, Lydian, Harmonic Minor), and advanced concepts like superimposed pentatonics and diagonal runs. Each one highlights exactly which notes to play, shows color-coded added tones, and includes a description, playing tip, and the artists who defined the style.
14 scales and modes: Major, Natural Minor, Harmonic Minor, Melodic Minor, and all seven church modes. 9 guitar tunings: Standard, Drop D, DADGAD, Open G, Open D, Open E, Open A, Half-Step Down, and Full-Step Down. Every combination works with the solo style system.
Not at all. Everything is shown as chord names, piano diagrams, and guitar fretboards. Roman numerals and Nashville numbers are both available. It's designed for working songwriters, not academics.
Yes. When you identify a chord on the piano, the guitar fingering appears next to it. When you find a chord on the fretboard, the piano voicing shows up too. Every chord in the app displays both instruments side by side — you never have to switch or guess.
Not yet — iOS first. Android is on the roadmap. If you want to be notified when it's available, drop your email below.
Nothing. The trial gives you full access to every feature for 7 days. After that, a one-time payment of $9.99 unlocks it permanently. No features are held back or gated.
Free for 7 days. No credit card required.
Download on the App Store