GENERATIVE MIDI SEQUENCER · iOS
A generative MIDI brain for your synths, drum machines & modular.
Sequentia generates basslines, drums, chords, arps and modulation, all in key and in time, then streams them straight to your hardware.
COMING SOON
macOS
GENERATIVE
Random
Add a module and it writes its own part. Press Random and a full pattern is playing. Mutate keeps it evolving while it runs.
SIXTEEN MODULES
Drums to Bounce
Drums, bass, acid, chords, arps, stabs, piano, Euclid, Rain, Bounce, sampler and modulation in one rack.
YOUR WHOLE RIG
One each
Every module picks its own device and channel over USB-C, Bluetooth or network, and MIDI Clock keeps the gear in time.
HARDWARE CONTROL
Knobs turn
A hundred and thirty two machines load their own control map, and an LFO can sweep any knob in time with the pattern.
BUILT-IN SOUND
It makes sound on its own.
No gear plugged in? Every module has a voice and plays straight through the app, from a set of 174 sounds. Press play and you hear the pattern. The sound is free, it is not behind the paywall.
158 patches
24 acid voices on a real 303-style emulation, 120 polyphonic presets and 14 drum kits. Acid, bass, keys, plucks, pads, leads, organs, bells and more.
Chosen by ear
Sounds switch live while the pattern plays, so you pick by listening instead of by reading names. A speaker button turns each module’s sound on and off.
Never two of the same
Every module opens on a sound that suits what it writes, so a rack of six does not come out sounding like one instrument stacked six times.
Your gear still comes first
Plug in a MIDI device and the phone sound steps aside. It never doubles your synth.
HOW IT WORKS
Connect your gear. Press play. Let the algorithm play for you.
STEP 01
Connect
Plug in any synth, drum machine or modular rig over USB-C, Bluetooth MIDI or Wi-Fi. Sequentia is hot-plug aware and rescans on the fly.
STEP 02
Build a rack
Stack modules freely and route each one to its own device and MIDI channel. One global tempo, key and transport keeps everything locked together.
STEP 03
Play & evolve
Generate parts, turn on Mutate to keep them evolving, and reshape the rack live by adding, removing or editing any module while everything keeps playing.
SIXTEEN MODULES
One rack. Every part you need to play live.
Each module generates a different musical part in key and in time, routed to its own device. Add only the ones your set needs.
01
Acid
A 303-style bassline with slide and accent. The slides really bend pitch, on your gear and in the exported file.
02
Bass
Generative bass in 16 genre styles, from acid and techno through EBM to upright, with a step editor when you want to take over.
03
Drums
Eight lanes, 1,112 grooves across 19 styles, each with its own swing, 14 factory kits, and your own WAV samples when you want them.
04
Sampler
Play your own audio from the rack. Load a sample, place it in key and in time, and it runs with everything else.
05
Chords
Diatonic progressions in your project key, from a library of 417. Hold them as pads or feed them to an Arp.
06
Arp
Arpeggiates a chord, on its own or following a Chords module.
07
Stabs
Chord hits, from skank to rave. Twelve styles plus Random, with a preset library.
08
Piano
Draw a melody by hand, or let it write one in a genre you pick.
09
Euclid
Three euclidean rings at their own lengths, drifting apart and landing together.
10
Rain
Generative note drops, from a drizzle to a downpour.
11
Bounce
Physics balls playing your key off the walls.
12
Live Performer
One pad that plays the whole rack.
13
CC Control
Your synth’s own knobs, on the phone, with a looper for knob movement. It works the other way too: your controller turns the app.
14
Mod
LFOs that sweep a CC on your synth. No notes, just movement.
15
Vinyl
A record that turns while the rack plays, with the light and the grooves of a real one. Nothing to program.
16
Mixer
Solo, mute and level for any module while it plays.
GENERATIVE, NOT RANDOM
Tap Random for a new part. Turn on Mutate and it keeps evolving.
Every part is generated in key and in time. Generation is local, algorithmic and deterministic from a seed, so the same seed gives the same pattern, fully offline. No internet, no AI model, no cloud.
Mutate intensity 1 to 4, every N loops
Fully reversible, so the original part comes back untouched
BUILT FOR A MULTI-DEVICE RIG
Route every part to its own gear and never stop playback.
Add, remove or edit any module while the rest keep playing. Per-module MIDI output with no forced defaults, plus clock and transport to every connected device.
USB-C, Bluetooth MIDI and Wi-Fi (RTP-MIDI)
MIDI Clock (24 PPQ) with start / stop to every device
Background playback with Lock Screen and Dynamic Island controls
Send to DAW, per-module .mid and the whole project in one step
ONE APP · BOTH DEVICES
Now on iPad, with your projects on both.
ON IPAD
Laid out for the tablet
The rack becomes a grid of cards you page through, three across on a 13 inch. Menus arrive from the right and leave the instrument where it is, and a module you open steps into the middle of the screen with its settings beside it.
ICLOUD
The same work on both
Start a track on the phone and open it on the tablet, with the presets, the samples and the covers already there. It lives in a Sequentia folder in Files, so a project is a file. Off until you switch it on, and nothing moves until you answer.
EXPORT
The project out in one step
Take the rack out as MIDI, or every scene as its own folder, named so the session opens in your DAW already making sense. Samples come along if you want them.
LOVED BY MUSICIANS
What players are saying
“Sequentia is one of those apps that makes you wonder why nobody built it sooner. It gives musicians and producers a fast, inspiring way to generate and manipulate MIDI patterns without getting lost in complicated menus. Whether you’re working with hardware synths, drum machines, or a DAW, the workflow feels immediate and encourages experimentation. Highly recommended.”
This Is Going to Become a Must-Have App · s_imoke
App Store review · v2.1
“What i love about Sequentia is the random and mutate engine of the various modules. There will always be a happy accident in generating a sound from the modules.”
Random · plx///13
App Store review · 5 stars
“Really fun! Love pulling my phone and just jamming around with this app. Very well thought interface for iPhone.”
Amazing app · Josepablo91
App Store review · 5 stars
“Great sequencer so far. Small modules which some can interact, an arp can listen to a chord generator, or work completely independent with individual midi destinations. There is some quality to play live with it, and you can come up with ideas on a small footprint.”
Good · Prosit0
App Store review · 4 stars
“Unique and very inspiring balance between manual and generative sequencing. Best sequencer UI for phone imho.”
So much fun! · Martha Proton
App Store review · v1.0.2
“Very well thought out, it’s so fun and functional."
Well made! · andyspocket
App Store review · 5 stars
“I bought a lifetime license minutes after using the app with OP-XY. Ridiculously easy to set up and super fun as an idea starter. A great way to explore genres you’re not familiar with.”
Delightfully simple, super inspiring · Meatball Merlot
App Store review · 5 stars
“Very good idea. Thank you for all your efforts, the app is a joy to use.”
WOW Great · alf1959
App Store review · 5 stars
FAQ
Questions, answered
What is a generative MIDI sequencer?
Does Sequentia work with modular and hardware synths?
Does Sequentia run on iPad?
Does it work offline and collect my data?
Does Sequentia make sound without MIDI hardware?
Which modules are free?
What does CC Control do?
What is Live Performer?
How does the Euclid module work?
Will the phone sound double my hardware synth?
Can one module control several MIDI channels?
What are pattern slots and scenes?
Can I switch between different setups live?
Can I use my own samples?
Can my controller control the app?
Is Sequentia free?
PRICING
Sequentia is free. Pro is one unlock, three ways to pay.
Every module is free, together with the built in sound. Pro adds pattern slots, scenes, several racks, every drum style and unlimited projects.
FREE
$0
Everything you need to play hardware, forever. No account, and nothing expires.
Every module, and the built-in sound
Live Performer and CC Control in full
Your own samples in Drums
Three drum styles, one project and one rack
No account, and nothing expires
Download free
SEQUENTIA PRO
$39.99
/ year
Three days free first · Works out at $3.33 a month
Pattern slots on every module
Scenes, and several racks in one project
Every drum style
Mutate, Fills, Humanize and Chop
Pattern and preset libraries
Unlimited projects
MIDI to your DAW, and the whole project out in one step
Start 3-day free trial
LIFETIME ACCESS
$79.99
/ lifetime
Pay once. The same as two years, and then it stops. Every future update is included.
Buy lifetime
Prices are shown in US dollars for reference only. Actual prices may vary by country or region and may change over time. Please check the App Store for the current price in your region. A trial can be cancelled at any time before it ends, and purchases can be restored on any device signed in to the same Apple Account.