Reviving a classic KORG analog synthesizer.
The iconic 4VCO synthesizer, reborn on iOS.

The Mono/Poly analog synthesizer appeared in 1981 at the same time as the acclaimed Polysix. Not only was it a fat-sounding four-VCO monophonic synthesizer, it featured a revolutionary design that allowed it to also be used as a four-voice polyphonic synthesizer, which helped cement its legendary status.

The long-awaited “KORG iMono/Poly” iPad/iPhone app completely reproduces all features of the original Mono/Poly. Four VCOs and a rich array of modulation allow a wide range of detailed sound design. New functionality such as two multi-effects units and eight virtual patches are also provided. In addition, the seamless integration that you expect from KORG’s iOS apps will fit perfectly into your music making process. The Mono/Poly has been reborn for today’s world, bringing you a unique and legendary sound.

* Due to differences in CPU speed of iPads / iPhones, iPad 3rd gen/2/iPad mini/iPhone 4s are not supported, only iPad Air/iPhone 5s or later is recommended.

[ Features ]

• Deep 4VCO sound. A complete reproduction of the classic Mono/Poly
The Mono/Poly synthesizer featured four VCOs, a dedicated envelope generator for the VCF, and also sync and cross-modulation, earning it a reputation for its detailed sound-shaping potential and its distinctive character.

• Powerful virtual patches, and the latest presets to catch the scene
Eight virtual patches provide the ultimate expansion of the Mono/Poly’s distinctive sound-design potential. Two multi-effect units are also provided, allowing you to create complex and broad-ranging sounds with complete freedom.

• Quick access to all panels
Although iMono/Poly provides a vast number of parameters, it’s designed with a screen structure that provides quick and seamless access to all of them. With a single tap, you can rotate between the main synth & key assign screen and the virtual patch & effect screen. There’s no need to open individual screens for specific functions, or to move back and forth between them.

• Produce music in conjunction with KORG Gadget
iMono/Poly can be used in conjunction with “KORG Gadget,” the music production DAW app that has won numerous prizes within Japan and around the world. When you install both apps, iMono/Poly appears as the “Montpellier” gadget within KORG Gadget.

More info at

What's New

Version 1.1.2

• Fixed minor bugs

Ratings and Reviews

4.1 out of 5
18 Ratings
18 Ratings

We are Spoiled!

Appassin Greed

What's not to love about this? Alright, there's no Link and it's not an AUv3. But, it's a KORG Mono/Poly. For £20! And it works in Gadget, where you can have multiple instances. Or you can sample it into BeatMaker 3. I don't really care that it's not AUv3. Let's put this into perspective. If you told me 6 years ago that I would have access to a Mono/Poly, an MS20, a PolySix, an ARP ODYSSEY, an M1 and a Wavestation all on a tiny device that I can take anywhere I want, I wouldn't have believed it possible. Now look at me! I even have a Moog Model 15, not to mention numerous other amazing synths, drum machines, effect plug-ins, sequencers, samplers, MPCs and DAWs. We are truly spoiled.

Simply stunning


Korg know just how to hit the right spot with their music apps. This one sounds amazing and is such a pleasure to play and tweak. It comes fully loaded and works great inside their Gadget app. I just ran four instance of this inside Gadget and created a knew epic synth. Even better - sample it in Beatmaker 3 and create your own instruments. Awesome 😊

Great app, proper instrument, but please lose the awful Monopoly game skin


Pointless addition that embarrassingly misses the market for this app. Please tell me how to permanently disable the awful skin that makes the instrument unreadable at huge memory cost.

Developer Response

We are sorry for the lack of optimization of the image size. We are trying to reduce the size of images. It will be fixed in future updates. Thank you for your patience. Best, KORG app team


215.5 MB
Requires iOS 9.3 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad Wi-Fi (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation) and iPod touch (6th generation).
English, Japanese
Age Rating
Rated 4+
© 2017 KORG INC.
In-App Purchases
  1. Expansion Factory Pack £4.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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