The theory books, made interactive.
Five free tools a musician actually uses: the Circle of Fifths, a Metronome, the Groovebox, the Chord Library and the Fretboard Visualiser. The reference pages are free: no sign-up, no adverts.
Practise freeEvery key signature, relative minor and diatonic chord set.
Clean and free, with tempo markings and subdivisions.
Grooves, song structure and cadences, with a band to play them.
How chords are built, and every shape.
Every scale and mode, laid out on the instrument.
Built for the stretch after the beginning, when the songs stop being enough and the next step isn't obvious.
The reference page is the tool: read the circle of fifths, then play it, on the same page.
The practice room
A free account opens the practice room. Make a song with your band and save it, then take it to chord practice, strumming, the scale that fits, and free play over it.
Make a song with your bandA backbeat, a new kit, a strum, a new chord. Saved.
Take it to any practice screenYour song, behind chord practice
Free play over your songThe notes lit, the chord tones glowing
No card, and it never commits you to paying. On the way, free as each one arrives: Ear Training, Bass Grooves, Blues and Licks, Rhythm Grid.
One step at a time
- Now, free
The reference pages explain the theory behind what you play, on your own instrument.
- Now, with a free account
The practice room puts it under your hands, with a band to play along with.
- After launch, paid
The Practice Diary keeps a record and shows what to work on next, in the order it has to come. It will be a paid option, clearly marked, and never sold to children.
- Coming
Listening: Gressus hears what you actually play, and tells you the one thing to change. Alongside your teacher, never instead of them.
Who made it
Made by a software engineer who is also a qualified secondary-school teacher (QTS). Read the story
Teachers: the reference pages are free to use in lessons. For teachers and schools
No adverts. No trackers. Nothing sold.
No adverts. No streaks, no leaderboards. No third-party tracking. Nothing sold. We count how many people visit a page, and nothing about who they are.
Practise free with Gressus
The diagrams become tools you play, and your band comes too. No card.