Content rating
Everyone
1+
Downloads
Content rating
Everyone
In-App Purchases
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

SynthMate puts a looper, an arpeggiator, knob automation and an always-on recorder between your MIDI keyboard and your sound. It is the firmware of the SynthMate hardware, running on your phone: connect a USB MIDI keyboard or synth, and everything you play passes through it.

LOOPER
Just play: recording starts with your first note. Tap REC to close the loop, then layer up to seven overdubs. Mute layers, set each one's velocity, and punch in stutter, octave, speed, chop and reverse effects while you hold them. Add an audio file or a recording from the phone's microphone to play along with the loops.

ARP
Hold notes and they repeat in the order and rhythm you played them. Ten modes: Rhythmic Memory (the rhythm is what you played), Uplift and Hold, Double/Triple, Velocity Accent, Direction Flip, BPM Nudge, Rest Suppress, Ping-pong and Gate Length. Tap tempo, freeze, and transpose a pattern while it plays.

SKIPBACK
SynthMate quietly records everything you play, up to three hours back. Missed the good take? It is still there: chop it onto the keys and play it again, or turn it into a loop.

DEFAULT: AUTOMATION AND MODLINKS
Hold REC and move a knob: the movement is recorded and replays while you play. Link the mod wheel, a pedal, pitch bend, aftertouch, velocity or random values to any knob, across the range you choose. Split the keyboard and send one side to a second synth.

EXTRA
Playing helpers: Keyboard Hold and Hold Legato, Chord Hold, Rhythmic Gate, Ratchet and Zawinul Mirror (the keyboard upside-down).

PRESETS
Every program number keeps its automation, links, loops, Skipback, split and modes. A program change saves the one you leave and recalls the new one.

MIDI ROUTING
Any number of USB MIDI devices through a hub: inputs merged, two outputs, and a mirror of OUT1 to other gear. A setup is remembered for every set of devices.

THE SYNTHMATE BOARD
Own the SynthMate hardware? The app is also its editor: settings, presets and firmware updates over USB, free.

WHAT YOU NEED
An Android phone with USB host (OTG) and MIDI support, and a class-compliant USB MIDI keyboard or synth. Set your keyboard to Local Off so you hear what SynthMate sends.

DEMO AND FULL VERSION
The free download is a demo with every feature. It does not keep presets after the app closes and stops after 20 minutes (start it again to go on). One in-app purchase unlocks the full version for good.

No account, no ads. Usage data is shared only if you switch it on.
MIDI toolbox for your keyboard instrument
Updated on
Oct 29, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Location, Financial info and 3 others
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

Thank you for testing SynthMate! Connect a USB MIDI keyboard or synth (set it to Local Off) and try LOOPER, ARP, SKIPBACK, DEFAULT automation and EXTRA. Please report crashes, anything that sounds or looks wrong, and anything confusing to ahoy@stepan.engineer. Stay opted in for at least 14 days, please - it helps the app reach Google Play.
Content rating
Everyone
In-App Purchases
Learn more

App support

Phone number
+420799570509
About the developer
Ing. Štěpán Dvořáček
ahoy@stepan.engineer
Nuselská 242/44 140 00 Praha Czechia
+420 799 570 509