Some Might Play

iPhone · English & French · no account

You arrive with a feeling.
You leave with chords you can play.

Pick a mood — melancholic, britpop, 90s rock, dreamy — and get progressions that sound like it, in any of the twelve keys, with real guitar fingerings and a loop you can hear while you write over the top.

Get it on the App Store

Free.
Pro unlock €7.99, once.

A progression open in the app: chord diagrams for G, D and Em, a play button, tempo, and the solo mode button.

Moods

Start from the feeling, not the chord

Sixteen moods, fifty-seven progressions. Each is stored as roman numerals and a mode, never as chord letters, so it transposes into any key without losing what makes it work. Every one is spelled out in a real key before you open it, and says what it is doing in words a player would use.

i — VII — VI — VII
the aeolian vamp · rocks between the minor tonic and the two chords below it · never resolves

The moods grid: melancholic, britpop, 90s rock, anthemic, dreamy, dark and cinematic.
Sixteen moods
Melancholic opened: Start on the six, Aeolian vamp and Andalusian cadence, each with its numerals and its chords.
What is behind one
The builder: pick a key, add a chord, and get ranked continuations with the reason each was offered.
Or write your own

Backing track & key

A band under it, in any key

Drums and bass under any progression, in six styles, following your chords and your tempo, with the bass leading into every change. A mixer pulls the guitar out when you would rather play that part yourself, or drops the drums when you only want the pulse.

And the key is one tap. Every progression is stored as numerals, so all twelve keys are the same progression — which matters the first time somebody tries to sing it and finds that the key it was written in is not the key their voice wants.

guitar only · rock · pop · ballad · shuffle · waltz
the band is Pro · the key is free

The backing track panel: six styles with Pop selected, a mixer for guitar, bass and drums, and the key picker underneath showing all twelve keys.
Soloing over a progression: the pentatonic on the neck, coloured by root, third and fifth.
The soloing guidance: start here, land on the third, move before the chord does, notes you can hold through.

Fingerings, capo, scales

Shapes a hand can hold, and what to play over them

Chord boxes are generated from fret data, never shipped as pictures: open shapes where they exist, movable shapes everywhere else, left-handed for free. Then the scales that fit, drawn on the neck by degree, with the note to land on for each chord and the ones you can hold straight through a change.

The capo trick

B♭  F  Gm  E♭  — four barre chords
capo 3 →  G  D  Em  C  — four open chords

The whole neck

See the next chord before it arrives

Press play and the neck follows the loop. The notes of the chord sounding now are coloured by what they do, and the ones with a ring around them belong to the chord arriving next: land on one as the change happens and the phrase resolves into it instead of merely fitting. Turn the phone sideways and all fifteen frets are there at once.

The whole neck in landscape while the loop plays: fifteen frets, the notes named, coloured by root, third and fifth, with the notes that belong to the next chord ringed.
  • Root
  • 3rd
  • 5th
  • In the next chord too
  • Chord note outside the scale

Press play, then turn the phone sideways

Solo mode · Pro

A solo, written for your progression

It scrolls past you as live tablature, with the neck lighting up underneath. Hear it while you learn it, slow it down to a tempo you can follow, then mute it and take it over.

The line is composed, not sampled at random: the downbeat of each bar is a chord tone, the note before a change belongs to the chord arriving, and a motif comes back at the top of every chorus so there is something to recognise.

Solo mode: fret numbers travelling towards a line, on six string lines, with the neck below.
A minor · 96 BPM · what the app writes over i — VII — VI — VII

The bench · free

The things you reach for before writing anything

A chromatic tuner that holds a reading while the string decays and still works in a room with a television on, a metronome, and a game that teaches you where the notes are. None of it costs anything, because an app nobody opens sells nothing.

The tuner: a dial, the six reference notes, and a Listen button.
Tuner
The metronome at 100 BPM in 4/4, with the beats shown as dots.
Metronome
Learn the neck: find this note, E, with every E on that stretch of the neck ringed.
Learn the neck

What costs money

One payment. Nothing renews.

Free

the tools and the theory

  • Three progressions in every mood
  • The loop, any key, any tempo, any feel
  • The scales, the target notes, the capo advice
  • Chromatic tuner, metronome, fretboard game
  • Write your own progressions in the builder
Download free

Pro · €7.99

bought once, yours for good

  • Drums and bass under any progression, six styles
  • Solo mode
  • Every position on the neck, triads, CAGED shapes
  • Save your progressions, arrange them into songs
  • A printable one-page chart, black on white
  • The full catalogue
Get the app, unlock inside

Privacy

It has no way of knowing who you are

No account, no analytics, no advertising, and no networking code at all. The chords, the sound, the scales and the charts are all made on the iPhone, which is also why the whole thing works with the aeroplane mode on.

The tuner listens through the microphone to work out which note you are playing. The audio is analysed in memory as it arrives, and never recorded, stored or sent anywhere. Everything else works whether or not you grant it.