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The One Thing logo NO TEACHER · YOUR OWN PACE · IT CHECKS YOU

The practice that decides for you.

Open it, press start, play. It builds your daily theory & fretboard session, checks every answer, and walks you along a 25-step path — on your own schedule, no teacher, no planning.

Runs in your browser on any device · Mac & iOS apps coming · Practise even without your guitar
The One Thing fretboard: C-form CAGED shape, colour-coded scale degrees across the neck
FOR PLAYERS STUCK ON THEORY — NOT FOR BEGINNERS LEARNING SONGS

Why it works

Most apps teach you songs. This one trains the thing that actually unlocks the neck.

The app decides

One tap sets today's balanced session — warm-up, work, review, cool-down. You practise instead of tweaking settings.

🎧

Hands-free, away from the guitar

Ear and theory drills that run by voice, on the move. The only practice that works when the guitar isn't in your hands.

Mastery, not just lessons

Spaced repetition with a hard rule: a level counts as mastered only when your answers get fast and stay right.

Inside the app

Real screens, not mock-ups.

ARPEGGIOS, SHAPE BY SHAPE

See the chord tones connect across the whole neck.

Major 7, minor, dominant, altered — each arpeggio drawn in its CAGED form with the path between shapes traced for you, so the neck stops being a set of isolated boxes.

Arpeggio shapes on the fretboard: Major 7, C-form, with connections traced across the neck
Arpeggios — Major 7, C-form, fret 1, with the route to the next shape traced.
SPEED — 3 NOTES PER STRING

Clean speed, built one string pair at a time.

The 3-notes-per-string walk with fingering markers, an auto-accelerating click, timing tests, legato and hybrid picking. The rest of the neck dims so you only see what you're training.

Speed drill: three notes per string with fingering markers
Technique → Speed — the walk isolated on the strings you're working.
HANDS OFF & ON THE MOVE

Practise theory with the guitar nowhere near you.

Pick the silent drills and train your eyes and mind anywhere — or go voice-only: the app asks aloud, listens for your answer, and won't move on until you're right. Say “repeat”, “skip”, “help”.

Hands off: choose the drills for this session On the move: voice-only practice
Left: pick your hands-off drills. Right: voice-only mode — no need to look at the screen.
PROGRESS YOU CAN SEE

Know exactly how much neck you own.

Fretboard learned, today's minutes, streak, and an honest verdict on your pace against the goal you set.

Progress dashboard: fretboard learned, today, streak, pace

Take the tour

Click through what a serious practice system actually contains.

The app builds your day

Choose 15 to 90 minutes. It lays out warm-up, work, review and cool-down, splits them into hands-on and hands-off, and allocates the minutes for you — then checks every answer as you go.

  • A 25-step path, one rung at a time
  • Yesterday · today · tomorrow at a glance
  • Press start and follow — no decisions
Today's session

Nine topics on one neck

Notes, intervals, scales & modes, triads, arpeggios, harmony, reading, repertoire, technique — all trained on the same colour-coded fretboard, in any key.

  • CAGED forms and modal colours
  • Blank neck, note finder, ear training
  • The key mover rotates the whole app through 12 keys
Triads on the fretboard: diminished, closed voicing

Speed that stays clean

Three notes per string with fingering markers, auto-accelerating click, timing test, legato and hybrid picking — isolated so nothing distracts you.

  • Patterns across the whole neck
  • Click that speeds up on its own
  • Legato & hybrid picking drills
Speed drill

Voice-only, hands free

It asks aloud and listens. A wrong answer keeps the same question until you nail it. Walk, commute, cook — the practice comes with you.

  • Say “repeat”, “skip”, “stop”, “help”
  • Silent drills for quiet rooms
  • Counts toward eyes · mind · ear
On the move, voice-only

Everything is measured

Each exercise feeds a specific skill — eyes, mind, ear, hands — and only the scored ones move your progress. Free play stays free.

  • Eight scored exercises, from finding notes to swapping chords
  • First-try accuracy tracked per item
  • Explorers and free play don't touch your score
Which exercises are scored and which skills they move

A field guide, not a manual

The app looks busy because it holds a whole curriculum — but it only ever answers three questions. The built-in guide gets you playing on day one.

  • What can I study? · What do I do now? · How am I doing?
  • A first-day, three-step start
  • Full manual and a two-minute tour inside
The One Thing field guide

What's inside

Nine topics. Theory and its drills in the same place — no jumping between a book and an app.

01NotesBlank neck, note finder, find by ear
02IntervalsExplorer plus an ears-only drill
03Scales & ModesModal colours, characteristic notes, CAGED
04TriadsThe lab, connect the chords, inside/outside
05ArpeggiosShapes, speed drill, inside/outside
06HarmonyExtended chords, substitutions in 12 keys
07ReadingScore and TAB, rhythm, sight-reading
08RepertoireYour songs: audio, MIDI, Guitar Pro, A-B loop
09Technique3 notes per string, legato, hybrid picking

Get The One Thing

Full training, all nine topics, cloud sync across your devices.

FOUNDING MEMBER
€79 / year
  • A fresh practice session built for you every day
  • All nine topics, from notes to technique
  • Hands-free & voice practice
  • Progress dashboard & cloud sync
  • Mac & iOS apps when they land
Launching soon — founding-member price locked for life.