Tools & features

Strumly's toolkit is a set of single-purpose practice tools that run in the browser. No installs, and during early access, no paywall. This page covers what each one does and when to reach for it.

Pitch and time

Tuner — a chromatic tuner using your microphone. Pitch detection runs locally in your browser using the YIN algorithm; nothing is recorded or uploaded. Free forever, no sign-up — this is the tool that stays free even after early access ends.

Metronome — a plain, accurate click. Set the tempo and go. Most of the drills the coach assigns assume you'll do your between-session reps against a click, and this is the click.

Strumming trainer — strum patterns against a beat so the pattern becomes automatic instead of something you count. Start slower than feels necessary; the trainer is for grooving a pattern into muscle memory, not testing your maximum speed.

Chords and harmony

Chord library — fingering diagrams and reference for the chords you'll actually meet. Use it alongside the chords lesson if you want to understand why the shapes look the way they do rather than just memorizing grips.

Scales — the scales guitarists lean on, mapped on the fretboard. Paired with the scales lesson for the theory underneath.

Transpose — move a song's chords to a different key, or work out where to put a capo to keep open shapes while matching a singer's range.

Songs — chord sheets with play-along support. Song pages link into the coach, so you can take a song's specific changes straight into a scored drill.

Backing tracks — progressions to play over when practicing scales or improvising. Practicing lead lines against real harmonic context beats running patterns in silence.

Ear training

Ear trainer — interval recognition drills with spaced repetition, so intervals you miss come back more often than the ones you know. The intervals lesson explains what you're listening for. Ten minutes of ear training a few times a week compounds faster than almost anything else in this list.

Recording and tone

Looper — record a phrase in the browser and layer over it. Useful for hearing your own timing honestly (recording yourself is the cheapest feedback loop in music) and for practicing lead over your own rhythm playing.

Amp Lab — explore amp voicings and tone shaping.

Rig — a signal-chain builder for planning pedalboard order and rig routing. The signal chain guides cover the engineering behind it: impedance, gain staging, buffering, effects-loop routing.

Bench — a diagnostic that walks your rig systematically when something sounds wrong.

Structured learning

Learning path — a sequenced set of steps for building fundamentals in a sensible order, with progress tracking stored in your browser.

Lessons — free theory lessons on chords, scales, and intervals. Each one ends with a quick quiz and links to the tool where you practice what you just read.

Guides — longer-form articles: practice methodology, signal-chain engineering, and rights & ownership topics for working musicians.

The coach ties it together

Every tool works standalone, but the coach is what connects them: it knows which drills you've run, scores your chord changes live, and hands you practice plans that reference the tools above. The tools are the gym equipment; the coach is the trainer walking the floor.

Practice data and privacy

The microphone-based tools (tuner, chord drills, play-along) analyze audio locally in your browser — raw audio is not uploaded. Tool progress that doesn't require an account (streaks, path progress, ear-trainer stats, quiz results) is stored in your browser's localStorage, which means it's per-device and clearing site data resets it. Coaching history and drill scores are tied to your account and stored server-side so the coach can remember you across devices.