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 26 or later, and iPad with iPadOS 26 or later.

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

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

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

Start here

Never made a beat? Perfect.

A short tour builds your first song with you, step by step. Controls open up as you make music, or you can show them all from the start.

Name ideas for every song
Haptics that tap along with the beat
Light Sync for AirPlay speakers and wireless headphones

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 your light packs and color sets at hand.
TakesPro
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
TilesProFalling tiles show what's next
WordmarkProThe name, spelled in lights
Code RainProGlyphs raining down in color
RocksProVector rocks shot apart on the beat
PipesProPipes that grow on every hit

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

6 light packs come free. Pro has all 45.

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.

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

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.

Everywhere