Practise with purpose.
A guitar tutor you talk to while you play. Ask out loud, hands still on the strings, and watch the answer land on the fretboard.
For self-taught players who are done guessing.
Stringfellow Where else can I play C up the neck?
All over it — here’s C in four voicings, from the open shape up:
Voice-native
Your hands never leave the guitar
Tap once and it’s a conversation. It hears you over the playing, answers out loud, and draws the diagram while it’s still talking — then stops the moment you cut in. Nothing to type, phone on the stand.
My pinky won’t reach on that F.
Then don’t make it — play the four-string F. Same chord, no barre: drop the two bass strings and it’s three fingers.
Asked out loud, answered out loud — and the shape is on screen before the sentence ends. Talk over it whenever you’ve got it.
Ask
Stuck? Just ask.
Stop scrolling YouTube for the one minute of video that might answer your question. Ask directly, and get a straight answer with the diagram to match — mid-practice, in seconds.
“Why does this progression work?”
“Give me a two-minute drill for C to F.”
“What do I play over an A minor jam?”
“What’s a cheaper way to play B♭?”
Real questions, mid-practice — answered in seconds.
See
Every answer lands on the fretboard
Ask for a progression and every shape arrives side by side, Roman numerals included. Swipe the alternate voicings, flip the labels, tap ▶ to hear any of them. No more squinting at a chart in a paused video.
I–V–vi–IV in C
Understand
Theory, demystified — and put to work
Why does G pull so hard back to C? Keys, the circle of fifths, modes, triads and CAGED become interactive answers tied to the chords under your fingers — not a chapter to memorise first.
The CAGED system, worked all the way through ↓Modes
The one note that makes a mode sound like itself
Modes are where most self-taught players stall — seven names for what looks like the same seven notes. Stringfellow draws the difference: the root ringed, and the characteristic tone in gold, the single degree that separates this mode from the major or minor scale it otherwise shares.
D Dorian and D minor differ by one note. That gold B is it: the natural 6th where minor has a ♭6 — the reason Dorian sounds hopeful where minor sounds sad. Ask for any of the seven and the map redraws with its own tone lit, plus parallel and relative views to hear it against.
- Ionian the major scale
- Dorian ♮6
- Phrygian ♭2
- Lydian ♯4
- Mixolydian ♭7
- Aeolian the minor scale
- Locrian ♭5
A worked example
Five shapes. The whole neck.
The five open chords you already know — C, A, G, E and D — repeat up the fretboard and tile it completely. Every chord, anywhere, is one of these five shapes in disguise.
Because each one is movable. Slide a shape up and lay your first finger where the nut used to be: F major isn’t a new grip to memorise, it’s the open E shape wearing a barre.
So every chord exists in five positions, and they connect — each shape ends where the next begins. Isolate one, flip on its pentatonic box, and the lead boxes turn out to live exactly where the chord shapes do.
This demo stays in C. for all twelve keys — and for the same picture on your own guitar, mid-conversation.
C major — CAGED up the neck
Every grip here is a curated voicing relocated by exact pitch math — the same data the app draws from. And in the app, all of this is one sentence: “show me C major up the whole neck.”
Listen
It hears your guitar, in any tuning
Say “tune me to drop D” and the tuner comes up already set for it, string by string, down to a couple of cents. And it stays set — every chord and scale after that is computed for the tuning you’re actually in.
StandardDrop DDADGAD Open GOpen DE♭ standardD standard
Drop D“I want to play in drop D”
- 6 E → D down a tone
- 5A✓
- 4D✓
- 3G✓
- 2B✓
- 1E✓
One string to move — and every card after this is drop D.
Practise
Turn answers into ability
Any answer becomes a workout: one-minute change drills against a real metronome, strumming patterns you can loop, ear training graded on the device — not vibes. Or take a lap around the circle of fifths.
Strumming — D DU UDU ♩ 92
One-minute changes C ⇄ F
The number goes back to the tutor — it coaches from your score.
In the box
The tools you’d otherwise keep four apps for
A tuner, a metronome, an ear trainer and a chord detective — all in here, all wired into the same tutor, so the thing you just measured is the thing it coaches you on.
D6th string
In tune · +2¢
Which interval is this?
You’re holding
C major
open position · root on the 5th string
The library
Every chord and voicing you’ll ever need
Browse by key, by name, or by the progression you’re chasing — hear them, pin them, or just ask. Every one rendered as a proper chord card, with alternate voicings a swipe away.
Never a guessed diagram
Every voicing comes from a curated chord library, and every scale and note map is computed in code — the tutor chooses what to show you, it never invents a fret number. If Stringfellow shows it, it’s right. That’s the standard a tutor should be held to, and it’s the one thing a chatbot can’t promise you.
Why it sticks
It fits the way you actually practise
It meets your level
One slider — beginner to advanced — and the same question gets a plainly different answer. No jargon you didn’t ask for, no hand-holding you’ve outgrown.
It knows your guitar
Tell it your tuning and your capo once. Every diagram after that is computed for the instrument in your hands, not a generic one.
It keeps the thread
Conversations are saved and resumable, diagrams and all. Pick up Tuesday’s lesson on Thursday without explaining yourself again.
It works hands-free
Voice in, voice out, visuals on screen. The whole product was built around the fact that your hands are busy.
And it keeps going
A companion, not a course
Everything below is in the app today. No modules to unlock, no lesson tree to grind — just ask for the one you need.
Chords & voicings
828 curated voicings
86 chord types in every key, from a curated library — so a diagram is either right or absent, never invented.
Every shape, swipeable
Open, barre and up-the-neck alternatives on one card with position dots. Swipe to the one your hand can actually reach.
Progression cards
Ask for a progression and it arrives as a single row with Roman numerals computed for the key. Tap a chip for the full chord.
Capo intelligence
“Play this in B♭ with open shapes” returns the capo position, the shapes and the sounding names, with the capo drawn on the neck.
Reverse lookup
Give it the frets you’re holding — x32010 — and get the name back, with the slash chords and inversions it also answers to.
Chord-change coaching
Between any two shapes: which finger anchors, which slides, which lifts, and the order to move them in — drawn side by side.
Power chords
Every 5 voicing findable by any name, with the guidance that goes with them: no third, slides anywhere, the root names the chord.
Nashville numbers
Numbers and Roman numerals computed from key and chord — and accepted as input, so “1-5-6m-4 in G” is a request it understands.
The chord library
A full-screen browser: curated picks, search with alias forgiveness, a key’s six diatonic chords, famous progressions in any key.
Fretboard & theory
Note maps for anything
“Show me every C”, any scale, any mode — the note set computed in code and mapped across the neck, not pulled from a picture.
Pentatonic boxes 1–5
Each position windowed and labelled on the card, addressable both ways: ask for position 2, or ask what the box at fret 8 is.
The seven modes
Ionian to Locrian on the neck, each with its characteristic tone lit in gold, plus parallel and relative views to hear it against.
Triads everywhere
Every quality, every string set, every inversion, computed across the whole neck. The gateway out of open-chord territory.
The CAGED system
Five shapes tiling the neck in any key, major or minor, each tied to the pentatonic box that lives in the same place.
The circle of fifths
Tap a key for its neighbours, its diatonic family and its relative minor — and hear the triads rather than just read them.
Key signatures
“What sharps are in A major?”, computed and drawn — the bridge between scale maths and reading an actual chart.
Scale against chord
A comparison layout showing which chord tones sit inside the scale you’re playing over. This is the road to soloing.
The whole neck
Full-length maps run frets 0–15 at readable width — pan for the rest, or expand any card full-screen in landscape.
Sound & practice
Hear anything
▶ on every card — chords, patterns, intervals — synthesised on the device, and aware of your capo and your tuning.
Real guitar voices
Steel and nylon sample banks that passed the ear test, with an A/B row so you can pick the one you want to practise against.
A proper metronome
Tap tempo, 30–260bpm, 2/4 through 6/8, accent on the one. Full-screen, fully offline — it’s just your phone keeping time.
Strumming patterns
A library of patterns on arrow-grid cards, looped with a live playhead, so you see and hear the same rhythm at once.
One-minute changes
The classic drill, full-screen: cue alternation, countdown, metronome, score — and the number goes back to the tutor for coaching.
Ear training
Interval and chord-quality rounds with difficulty tiers, graded on the device. The tutor is never told the answer.
Play around the circle
The circle steps and you play the chord it lands on — fifths, or the guitar-idiomatic fourths, in major, minor or sevenths.
Loop suggestions
Two-to-four chord loops built from the shapes you already own — practice disguised as playing something that sounds good.
Made for playing
Hands-free voice
Tap once and talk: it hears you over the playing, answers out loud, draws the card, and stops the moment you cut in.
A tuner that listens
Per-string detection down to a couple of cents, chromatic mode, every tuning it knows — and no server in the loop.
Alternate tunings
Drop D, DADGAD, open G and D, E♭ and D standard — with shapes curated per tuning, because voicings don’t simply transfer.
Your explanation level
Beginner through advanced, one control. The same question gets a plainly different answer, in text and in voice alike.
Conversations that keep
Every turn saved and resumable, diagrams included — pick Tuesday’s lesson back up on Thursday, or delete it and start clean.
Pin what you’re learning
Several cards pinned at the top at once, tabbed. G, C and D stay put while the conversation moves on without them.
Full-screen in landscape
Any scrollable neck expands to fill the screen sideways — the view you want when the phone is on a stand and you’re playing.
A catalogue of what it can do
Help is a curated list of everything the tutor handles, with examples that prefill the chat. Nothing good stays hidden.
iPhone and Android
One account across both, with your conversations following you between them.
Practise with purpose.
Your guitar’s already out — the rest takes a minute.