Memorizing sucks.
Become one
with the fretboard.
The guitar toolkit with intelligent tools and visualizations to help you deeply understand the fretboard as one connected system.
The fretboard isn’t one concept at a time — it’s one connected system.
Isolated chord charts and scale pattern catalogues don’t show you how concepts connect. fretengine’s integrated toolkit allows you to view multiple concepts simultaneously on the fretboard to learn relationships visually.
See why Dorian
works over a m7.
Deep enough to grow with you.
50+
Chord types
From major to minor, dominants, and complex jazz extensions
40+
Scales
Pentatonics, modes, melodic minor, exotics, and beyond
7,000+
Voicings
Open shapes, barre chords, box patterns, 3 per-string, and more
First pentatonic
to advanced progressions.
At any level, fretengine goes deeper than you expect.
- Beginner: Standard scale patterns and open + barre chords with clear theory explanations.
- Intermediate: CAGED zones, interval breakdowns, triads and inversions, expanded scale patterns.
- Advanced: Chord progressions, unique voicings, exotic scales + modes, voice leading.
Theory without
practice is trivia.
Everything you need.
Nothing you don’t.
Purpose-built tools to help you with intentional practice.
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Precision metronome
Set the tempo, hit play, and explore. The click runs in the background so practice never stops.
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Timeline sequencer
Build a chord progression, sync it to the metronome, and watch the fretboard change with each bar.
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Note explorer
Learn every note on the neck by name or tone.
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CAGED zones
See the CAGED zones across the neck alongside your chords and scales.
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Built-in theory
Every chord and scale comes with interval breakdowns and thoughtful explanations. The why, not just the where.
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Many more
An ever-growing list of thoughtful learning tools for guitarists.
Making music is fundamentally human.
Technology should make you a better musician — not replace you. fretengine doesn’t play for you. It shows you the fretboard in ways that build genuine understanding, so when you pick up the guitar, you play with more intention, more confidence, and more feel.
Built by a musician for musicians. No ads. No corporate agenda.
Done memorizing?
Good.
Open the app and layer your first chord and scale. It takes seconds to see new connections.
Questions, answered.
Is it actually free?
The core toolkit is completely free. No account required, no ads, works in any browser.
How is this different from a chord dictionary?
Most fretboard tools let you look up one chord or one scale at a time. fretengine lets you stack them: layer a chord and a scale on the same fretboard, toggle between them, see exactly where they overlap. Pair that with 7,000+ voicings, integrated practice tools, and built-in theory.
We happen to believe it’s also the best chord dictionary out there.
Do I need to know music theory?
No. Whether you just learned your first barre chord or you’re exploring modal interchange and voice leading, fretengine meets you where you are. Every chord and scale includes built-in theory explanations.
Do I still need a guitar teacher?
There’s no replacement for an excellent teacher and mentor! They will always be able to teach you things online tools and videos cannot. fretengine is a learning tool that can help you reach the next level in your journey, whether you have a teacher or not.
Which instruments are supported?
6-string guitar in standard tuning today. Let us know if you’d like to see support for new instruments!
Does it work on mobile?
Yes. Any modern browser, any device: desktop, tablet, or phone.