New: made for iPhone Duo

Every sound
is a light.

PolychromBox is a beat machine for iPhone, iPhone Duo and iPad. Tap in a beat, play it like an instrument, perform it like a DJ, and every hit lights up the screen.

Coming soon to the App Store See it play

For iPhone and iPhone Duo with iOS 27, and iPad with iPadOS 27.

PolychromBox on iPhone Duo, half open like a laptop: the lights on the lid, the controls on the base

9 sounds, each with its own color and light
16 steps, each sound on a loop of its own
45 light packs to see your music
11 sound packs, six variants of every sound
46 languages

Grid

Tap in a beat.

Nine sounds, from kick to arp, on a grid of sixteen steps. Each sound loops on its own length and at its own speed, so simple loops slide against each other into grooves that keep turning.

Six variants of every sound, picked step by step
26 patterns, A to Z, each with its own key and sound pack
Swing, a tempo from 60 to 180 BPM, and a metronome when you want one
Undo and Redo for every change

Pads

Play it like an instrument.

On the Pads tab, the sound you pick becomes something to play: a keyboard for bass, chords and arps that never leaves the key, or drum pads sized by how long each one rings.

Add what you play to the steps
Fit the loop to what you played, up to eight bars
Chain a new pattern every bar for as long as you keep playing
Six keys, and chords that follow every bar

Song

Chain it into a song.

Line up your patterns into a song of up to 64 blocks. Drag them into place, follow the part that's playing, and give any part a light pack of its own.

Perform

Then play it live.

Perform turns your song into DJ gear. Ride the mixer, drop effects that lock to the beat, and change the lights as you go.

Perform's mixer: three channels with color knobs, faders and Cut, and the master's knobs

Perform's beat effects: Echo, Roll, Wash, Filter, Crush and Gate, with Roll on, and their length and depth

A mixer
Drums, Bass and Music, each with a fader, a color filter and Cut. Filter, Space, Drive and Swing on the master.
Beat effects
Roll, Gate, Beat Echo, Beat Wash, Beat Filter and Beat Crush, in time, with a length and a depth.
Hits
Riser, Impact, Zap and Drop for the big moments, landing on the one.
An effects bank
Chop, Riff, Stab, Rewind, Scratch, Stutter, Flip and more.
Filter and Key
Sweep the filter with one finger, or move the whole song up and down in key.
Light effects
Strobe, Blackout and Freeze, with every light pack and color set at hand.
Takes
Record a performance. It plays back move for move, and exports with the song.

Lights

Forty-five ways to see your music.

Every sound has its own color and its own light, fired the moment you hear it. Some light packs even read the song ahead and build what's coming, so it lands right on the beat.

BloomA sun that beats with the kick
KaleidoEverything in mirrors
OrbitEvery loop is a ring
TilesFalling tiles show what's next
WordmarkThe name, spelled in lights
Code RainGlyphs raining down in color
RocksVector rocks shot apart on the beat
PipesPipes that grow on every hit

And many more, from a pinball table to a starfield.

Your colors
Pick a palette, make your own, or let the colors follow the key.
Shuffle
A playing song moves through your favorite light packs, or opens with the one you love.
Calm Lights
Gentler motion, and never more than three flashes a second. On by itself with Reduce Motion or Dim Flashing Lights.

iPhone Duo

Unfold the show.

On iPhone Duo, PolychromBox moves with the hinge. Half open, it's a little studio: the lights on the lid, the whole board on the base. Open it for the big screen, stand it up like a book, or close it and keep going on the outside screen.

PolychromBox on iPhone Duo half open as a laptop: the lights on the lid, the grid on the base

Half open like a laptop, the lights play on the lid while your hands stay on the base.

Nothing ever sits in the fold: the console keeps clear of it in every pose.

New Song: start from scratch, take the tour, open the demo, Surprise Me, or pick a preset

Sounds

Sounds to start from.

Eleven sound packs, each with nine sounds and six variants of every sound, all made by the app's own synth, from a console's sound chip to a drawbar organ. Mix them freely: a pack for each pattern, each sound, even each step.

Neon House
Boom Bap
Trap
Lo-fi
Latin Percussion
Dream Pop
8-Bit
Synthwave
Acid
Disco
Soul

Or start from a preset: house, boom bap, trap, lo-fi, dembow, son clave and more, and three classics written note by note: Korobeiniki, Pachelbel's Canon and Ode to Joy. Surprise Me makes a new song every time.

Every mixtape on one page: yours, the ones shared with you, and ours, each with its cover

Mixtapes

Make a mixtape. Pass it on.

Put your songs in order and you have a mixtape, its cover saying how long it plays. Share sends the whole tape as one file with every song inside, by AirDrop, Messages or Files, and it plays on any iPhone or iPad just as you made it.

Ours: a mixtape for every style comes with the app, with more on the way
Yours: change a song and it plays changed on every mixtape it's on
Shared with you: a friend's tape plays as they made it, takes and all
Make It Yours copies a track into your songs, to change as you like

Everywhere

From your pocket to the big screen.

PolychromBox on iPad: the full grid of nine sounds under the lights

PolychromBox on iPhone on its side: the whole board across the screen

iPhone
The whole app in one hand. Turn it on its side for the whole board at once.
iPad
Every sound on one grid, with room to perform, and shortcuts on a keyboard.
iCloud Drive
Your songs save themselves and follow you to all your devices.

On your TV

Put the lights on the big screen.

Mirror your iPhone to Apple TV with AirPlay, or plug in a TV: the light show fills the TV while the controls stay in your hands. Play the set from the sofa, or from the booth.

The whole TV for the lights, nothing else on it
The mixer, the effects and the pads on your phone
Light Sync keeps the lights on the beat with AirPlay speakers

PolychromBox on a TV: the light show on the TV, the controls on the iPhone in front of it, the screen mirrored with AirPlay

Your songs

Your songs, playing on.

Your songs are cards on the home screen, sorted your way, with your mixtapes on a shelf above them. Play a mixtape and each song comes in where the last one ends, even with the phone locked, with the Lock Screen's controls.

Start here