Comparison

Sunrizer synth vs KORG iMono/Poly

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sunrizer synth

This virtual analog synthesizer offers a rich, warm sound with advanced features like SuperSaw emulation and morphing parameter control. It integrates seamlessly with MIDI hardware and sequencers, providing a professional-grade sound design experience on iOS.

Highlights
  • SuperSaw sound emulation
  • Dual filters with configurable routing
  • Morph Group for parameter control
  • CoreMidi and background audio support
  • Multi-mode oscillator multiplication
  • Microtuning support
Features
Read full description

"This really is the synth that keeps on giving! Inspiration and intuition truly blend together in this musical instrument." Alan Parsons Sunrizer Synth is a virtual analog synthesizer that takes the definition of iOS synthesizer to the next level. Thanks to carefully designed architecture and heavy usage of coprocessor it blurs the boundaries between iOS and hardware synthesizers. Sunrizer was built to perform and works perfectly with any MIDI keyboard or sequencer. A lot of research has been done in order to achieve unique character, warmth and clarity. HIGHLIGHTS · True SuperSaw sound emulation, first found in the legendary Roland JP-8000 synthesizer. SuperSaw is a layered waveform consisting of multiple saw waves which are detuned to create an extremely full and epic sound. · Two filters per voice with configurable routing. 16 filter types available, including less common like Comb, Formant or Frequency shifter. · The Morph Group function lets you continuously morph of up to 30 parameters in a sound (including effects), using only the modulation wheel. · Full support for CoreMidi, MIDI mapping, Virtual Midi Ports and background audio. · Multi mode lets you multiply oscillators to get unbelievably fat and full sound. · Support for microtuning - load scl and tun files. Create fascinating microtonal music which uses intervals not found in the Western system of 12 equal intervals to the octave. OSCILLATORS · 2 warm-sounding analog modelled oscillators, 2 sub-oscillators (except SuperSaw). Available waveforms: Saw, PWM pulse,Triangle, SuperSaw, FM (frequency of phase modulation). 6 oscillators per voice in multi-sono mode. · Oscillator 2 hard-sync and configurable routing · FM (true frequency modulation) and PM mode · Osc-mix, ring modulator · White noise oscillator FLEXIBLE MULTI FILTERS · Two independent filters per voice with configurable routing. Filter types: LPF, HPF, BPF, Analog LPF, Notch, Comb, All pass, Power LPF, Power BPF, Wave shaper, Resonator, Resampler, LPF+Resampler, Frequency shifter. · Configurable routing: serial or parallel with bypass option. · ADSR envelope, keyboard tracking and full LFO control. MODULATION · Two LFOs per voice. It's possible to assign each LFO to almost any parameter. 3 LFO running modes: trigger, 1 shot, global. 6 waveforms, phase and fade-in knobs. · The Morph Group function lets you continuously morph of up to 30 parameters in a sound (including effects), using only the modulation wheel. · Two Modulation ADSR Envelopes for amplitude and filters cutoff. · Pitch and modulation wheels. EFFECTS · A number of effects are built in: distortion, hi-q reverb, chorus, rotary speaker simulation, equalizer, phaser and stereo delay. Dual-band FX processing. ARPEGGIATOR · Sunrizer incorporates very powerful programmable arpeggiator. You should think of it more like a small step sequencer. OTHER FEATURES · Over 380 presets, 7 additional banks available for FREE in web library (more coming soon) · Hold button allows you to to keep notes sustaining until you play new notes · With Chord Memory function you can play the chord by only pressing single keys · Phrase sequencer · Compatible with AudioBus · Adjustable polyphony: 6-20 voices · Playback modes: poly, solo, arp · Built-in recorder supporting AudioCopy, DropBox and iTunes file sharing. · Supports AUv3, MIDI, IAA, AudioBus 2.0 Visit www.beepstreet.com for user manual and audio demos. * Sunrizer is now available on Mac and PC, check our website for more info "Specs aside, the most important thing is the sound… and it’s great." musicradar.com "Sunrizer is the first truly mature polyphonic synth for the iPad, a real, smooth and powerful sounding option for all sorts of stage and studio performances." Mark Jenkins, author "Analog Synthesizers"

About

KORG iMono/Poly

Experience a classic analog synthesizer reborn on iOS. This app faithfully reproduces the iconic 4VCO sound engine, offering deep sound design capabilities with virtual patches and multi-effects. Seamlessly integrate it into your music production workflow.

Highlights
  • Faithful reproduction of classic 4VCO analog synthesizer
  • Deep sound design with extensive modulation
  • Eight virtual patches for expanded sound potential
  • Two multi-effect units
  • Quick access to all synth parameters
  • Integration with KORG Gadget
Features
Read full description

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 korg.com

Screenshots

Sunrizer synth3 screens
KORG iMono/Poly4 screens

Verdict

The call

The clearest difference is price: Sunrizer synth at $12.99 against KORG iMono/Poly's $29.99. Sunrizer synth also leads on in-app purchases (none vs 1) and rating (4.7 vs 4.3). KORG iMono/Poly's advantage is update cadence (every 2 months vs every 6 months). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Sunrizer synth costs $12.99 and KORG iMono/Poly $29.99 up front. KORG iMono/Poly sells 1 one-off in-app purchase. Sunrizer synth asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sunrizer synth holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 183 and 84 respectively. Written reviews point the same way: 88% of Sunrizer synth's written reviews are positive against 62% of KORG iMono/Poly's.

UpkeepUpdate frequency

Sunrizer synth ships an update every 6 months, KORG iMono/Poly every 2 months. The most recent releases landed on October 19, 2026 and October 17, 2026 respectively.

Scorecard6 real differences · 4 level
Sunrizer synth versus KORG iMono/Poly: the parameters behind the verdict, then further details
ParameterSunrizer synthKORG iMono/Poly
Price$12.99 — better$29.99
Rating4.7 (183 ratings) — better4.3 (84 ratings)
Positive reviews87.8% of reviews — better62.4% of reviews
Number of ratings183 — better84
Update frequencyEvery 6 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.39.3 — better
Further details — not scored
Size28 MB203 MB
Age rating4+4+
DeveloperBeepStreetKORG INC.

Customer experience

Sunrizer synth

All ratings183 ratings
Positive90.2%
Neutral5.5%
Negative4.4%
Written reviews303 reviews
Positive87.8%
Neutral5.3%
Negative6.9%

KORG iMono/Poly

All ratings84 ratings
Positive81.0%
Neutral6.0%
Negative13.1%
Written reviews141 reviews
Positive62.4%
Neutral16.3%
Negative21.3%

User reviews

Sunrizer synth

From 183 App Store ratings

What we love

  • 🎨 Exceptional sound quality
  • 👍 Intuitive and easy-to-use interface
  • 🎹 Powerful and flexible synth engine
  • 💡 Excellent preset library
  • 🎚️ Comprehensive modulation and effects

Room to improve

  • 🐛 Occasional crashes and glitches
  • 🔌 Compatibility issues with certain DAWs
  • 🔇 Limited audio export options
  • 🧭 Confusing preset management

KORG iMono/Poly

From 84 App Store ratings

What we love

  • 🎶 Great sounding synth
  • ✨ Fantastic sound quality
  • 🎵 Amazing features and sounds
  • 💻 Excellent for Gadget integration
  • 💡 Versatile for sound design

Room to improve

  • 🔌 No AUv3 support
  • 🚫 Useless without AUv3
  • 💸 Waste of money without AUv3
  • 📉 Low output volume
  • 🤏 Small controls, difficult manipulation

Bugs and requests

Sunrizer synth

Reported bugs

3 issues
  • Synth freezes when loading certain presets
  • Inconsistent behavior when using multiple instances
  • Graphical issues on newer iPad models

Requested features

4 requests
  • Improved MIDI integration and control
  • Expanded arpeggiator and sequencing capabilities
  • More advanced sound design tools
  • Ability to save custom tunings

KORG iMono/Poly

Reported bugs

15 issues
  • Cannot restore expansion pack
  • Cannot find store tab
  • Scale selection broken
  • User scale does nothing
  • MIDI unstable
Show 10 more
  • Audio pops
  • Monopoly skin removed
  • Does not work with nanokey studio Bluetooth
  • IAA Panel not displaying host link, transport, record buttons
  • MIDI IAA selection not appearing in Cubasis
  • On-screen keyboard plays fixed velocity notes
  • Arpeggiator doesn't work as expected in Gadget
  • User programmed sounds not visible in Gadget
  • Patches sound different in Gadget
  • App does not take advantage of larger iPhone XS Max screen size

Requested features

42 requests
  • AUv3 support
  • Adaptive Cubasis 3 AUv3
  • More iMPC integration
  • Transfer patches to desktop VST
  • Store preset files on device/flash drive
Show 37 more
  • Keyboard portamento to filter cutoff
  • Double tap knob to zero/fine adjust
  • Save mod wheel position in preset
  • Scroll and lock keyboard to key
  • Octave switches on left with large keyboard
  • Key transpose for arpeggiator
  • Undo/redo feature
  • Portamento on/off button
  • Arpeggio rate as mod destination
  • Full-sized keyboard button
  • Turn into AUv3
  • Bring back Monopoly skin
  • Add high-pass filter (HPF)
  • MIDI sync in
  • Export/share sounds
  • Assign right Kaoss pad like left
  • AUv3 version
  • Latch button for ARP patches
  • Random feature
  • Double tap to return dials to 0
  • Right XY pad assignable
  • More extensive external MIDI controller support
  • MPE support
  • More expansion packs
  • Access user patches within Gadget's Montpellier
  • Mod destination for VCO Mod Type
  • MIDI learn for all controls
  • Link on standalone
  • Improve effects quality
  • Add Korg Prophecy
  • Add Trinity, Triton
  • Improve IAA panel functionality
  • MIDI IAA selection from host
  • Fixed velocity on-screen keyboard improvement
  • Tempo synchronization with other apps (IAA, MIDI clock, Ableton Link)
  • Improve UI for larger screens
  • Immaculate skin option

In-app purchases

None

Sunrizer synth

No in-app purchases

1 purchases

KORG iMono/Poly

One-time1
  • Expansion Factory Pack$4.99

Questions

Is Sunrizer synth free?
Sunrizer synth costs $12.99, with no in-app purchases.
Is KORG iMono/Poly free?
KORG iMono/Poly costs $29.99, and also offers in-app purchases.
Which has better reviews, Sunrizer synth or KORG iMono/Poly?
Sunrizer synth is rated higher. Sunrizer synth averages 4.7 out of 5 from 183 ratings, while KORG iMono/Poly averages 4.3 from 84 ratings.
Do Sunrizer synth or KORG iMono/Poly have ads?
Neither Sunrizer synth nor KORG iMono/Poly shows ads.
Which is updated more often, Sunrizer synth or KORG iMono/Poly?
Sunrizer synth ships an update every 6 months, and KORG iMono/Poly every 2 months. Most recently, Sunrizer synth was updated on October 19, 2026 and KORG iMono/Poly on October 17, 2026.

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