How to use this site
Everything here is free and works on a phone with a guitar in your lap. Words you don't know yet — I, ii, V7, voicing, blue note — are in the glossary.
1 · Build a progression
Open the builder and pick a key. Tap the chord tiles to add bars — every tile belongs to the key and carries its roman numeral, and the next-chord suggestions say why each move works. Not sure where to start? Load a template like the 12 bar blues or I–V–vi–IV. Tap a bar to see its fingering and cycle voicings; while it's highlighted, tapping any chord replaces it, so you can audition options in place. Drag bars to reorder.
2 · Hear it
Play strums your bars with a sampled guitar. The strum pills change the feel — plain downs, the campfire D DU UDU, boom-chick with alternating bass, muted chucks, a swung shuffle — and you can switch mid-playback. Save keeps the progression in your browser, no account; Share copies a link that plays back exactly what you built, strum pattern included.
3 · Solo over it
Below the progression, Solo over this suggests scales that fit what you built — a dominant blues gets the blues scale first. Each link opens the scale page with your progression looping under the fretboard, so you can noodle while the changes roll. Tap a position number to isolate one box; Play sounds it and lights up each note.
4 · Look anything up
Chords lists every chord by root — each page has the fingering, what each note is doing, alternate voicings, and progressions that use it. Scales does the same by key and type, and the builder page links 29 ready-made progressions. Press / anywhere to search.
5 · Memorize the scales
The scale trainer takes you from seeing a scale to placing it from memory: study one box with real memorization techniques, then tap the notes that belong to the scale on an empty board — roots given, then no hints, then by degree name, then the whole neck. Every scale page has a Memorize this scale link straight into it.
6 · Make it fit your hands
Lefty in the header mirrors every diagram on the site. Transpose moves a whole progression by half steps, and the capo hint appears when open shapes can play it more easily. The sun switch is dark mode, and Awake keeps your screen from sleeping mid-practice. All of it is remembered on your device.
7 · Stay in tune
The tuner listens through your microphone and shows cents flat or sharp on a needle — or plays reference notes if you'd rather tune by ear. Nothing you play leaves your device.