Choose your input
Open KeyFlow, select your MIDI keyboard, and let the app publish a clean virtual output.
iOLABS · Edition 2026.01
KeyFlow
Scale-safe MIDI for live keys.
A MIDI scale filter for Mac, iPhone, and iPad that keeps your performance inside the right scale while preserving real chords, useful color notes, and stage-ready control.
AUv3 MIDI FX
CoreMIDI Router
Mac · iPhone · iPad
aumi KFlw ADrv
Live MIDI flow
From keyboard chaos to musical control.
KeyFlow sits between your keyboard and the instrument, reading MIDI before it reaches the sound.
KeyFlow
Keyboard → KeyFlow Out → DAW
The real interface
KeyFlow, wherever you play.
One focused MIDI workspace on Mac, iPad, and iPhone. Choose a scale, route your notes, and stay in control.
Signal path
Keyboard → KeyFlow → DAW
KeyFlow does not make sound. It shapes MIDI before the instrument sees it, on Mac, iPhone, or iPad.
Point the DAW to KeyFlow Out
Use KeyFlow Out with a CoreMIDI-aware setup or MIDI-capable instrument app.
Play with guardrails
Wrong notes are blocked, harmony-aware notes can pass, and the musical intent stays intact.
Commercial 1.0 baseline
Built for real live keyboard work.
Fast routing, readable controls, and a harmony engine for live MIDI work on every supported Apple device.
Scale Filtering
Choose a root and scale, then set Strictness from forgiving to fully locked. Chromatic mode is there when the song needs complete freedom.
Auto Detect Scale
KeyFlow can learn from the notes you play and switch when confidence is high enough.
Allow All Notes
Bypass scale filtering instantly, or combine it with Chord Aware for a chord-compatible palette.
Adaptive Harmony
Minor keys get musical borrowed tones for dominant movement and expressive progressions.
Chord Aware
Lower held notes inform the harmony while melody notes stay protected by the selected scale.
Router and AUv3 modes
Run KeyFlow as a standalone CoreMIDI router, or load its AUv3 MIDI effect in a compatible host. On iPad, keep the standalone app visible while routing.
Product identity
One KeyFlow experience across Apple devices.
KeyFlow is built for Mac, iPhone, and iPad. It includes standalone MIDI routing and an AUv3 MIDI effect for compatible hosts. AU identity: aumi KFlw ADrv.
Powered by iOLABS
Edition 2026.01
iO
Made by iOLABS
Music tools with a live-performance mindset.
KeyFlow is built by iOLABS, an independent studio focused on practical, stage-ready creative software for musicians, performers, and producers.
- Address
- 53, Kleisthenous str., Agia Paraskevi, 15343, Attiki
- info@iolabs.gr · marketing@iolabs.gr
- Phone/Fax
- +30 211 4029 329
Available now
Mac, iPhone, and iPad.
Download KeyFlow from the App Store for scale-safe MIDI on your compatible Mac, iPhone, and iPad. One purchase gives you the complete KeyFlow experience across your Apple devices.
View KeyFlow on the App StoreSupport and privacy
Clear answers before the first note.
Does KeyFlow make sound?
No. It processes MIDI before it reaches your instrument plugin, DAW instrument, or MIDI-capable instrument app.
Why doubled notes?
Your DAW may be receiving both the physical keyboard and KeyFlow Out. Use KeyFlow Out for the instrument route.
Does it collect data?
No. KeyFlow 1.0 processes MIDI locally, uses no network services, and includes no analytics or ads.
Where does it fit?
Use the router for whole concerts and sessions. Use the AUv3 MIDI effect when one compatible host strip needs KeyFlow.
Contact
Need help or want to talk about KeyFlow?
Send a message to iOLABS and include your device, OS version, host or instrument app, MIDI keyboard, and what you are trying to route.
Download KeyFlow on the App Store for Mac, iPhone, and iPad.