# SynthMaster One vs KORG iMono/Poly

The clearest difference is price: SynthMaster One at $9.99 against KORG iMono/Poly's $29.99. SynthMaster One also leads on rating (4.7 vs 4.3) and ratings volume (743 vs 84). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

SynthMaster One costs $9.99 and KORG iMono/Poly $29.99 up front. SynthMaster One sells 11 one-off in-app purchases and KORG iMono/Poly sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

SynthMaster One holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: SynthMaster One has 743 ratings behind it against 84, so its average is the more settled of the two. Written reviews point the same way: 64% of SynthMaster One's written reviews are positive against 62% of KORG iMono/Poly's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | SynthMaster One | KORG iMono/Poly |
| --- | --- | --- |
| Price | **$9.99** | $29.99 |
| Rating | **[4.7 (743 ratings)](https://appshunter.io/ios/app/synthmaster-one/id1254353266/reviews)** | [4.3 (84 ratings)](https://appshunter.io/ios/app/korg-imonopoly/id1256218493/reviews) |
| Number of ratings | **743** | 84 |
| Positive reviews | **63.8% of reviews** | 62.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 402 MB | 203 MB |
| Requires iOS | 10.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KV331 Audio](https://appshunter.io/developer/944155925) | [KORG INC.](https://appshunter.io/developer/363714046) |

## What reviewers say

### SynthMaster One

[App page](https://appshunter.io/ios/app/synthmaster-one/id1254353266)

This powerful wavetable synthesizer app offers an intuitive workflow for creating unique sounds. It features a rich library of wavetables, inspiring presets, and a semi-modular architecture for deep sound design. Easily sync data across devices and integrate with DAWs.

**Highlights:** Wavetable synthesis, Semi-modular architecture, 650 factory presets, AUv3 support, Cross-platform cloud sync, Real-time modulation feedback, 32-step arpeggiator/sequencer

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BigTone Club Construction Set | $4.99 | one-time |
| True Trance Sounds Volume 1 | $4.99 | one-time |
| Vandalism Future House | $4.99 | one-time |
| NatLife Retrowave Sounds Vol.1 | $4.99 | one-time |
| Demis Hellen Euphoric Trance | $4.99 | one-time |
| Venus Theory Trap Sounds | $4.99 | one-time |
| Vandalism Shocking Future Bass | $4.99 | one-time |
| NatLife Progressive&Deep Vol.1 | $4.99 | one-time |
| Bluffmunkey Cinematic Sounds | $4.99 | one-time |
| Desktop Presets Upgrade | $7.99 | one-time |
| SM One Expansions Bundle | $24.99 | one-time |

**What reviewers like**

- 🚀 Powerful synth engine
- 👍 Extensive preset library
- 🎨 Versatile sound design capabilities
- 💡 Free desktop version expansions on iPad
- 🎹 Excellent sound quality and tone

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 🔋 Battery drain in background
- 🤔 Confusing in-app purchase system
- 👎 UI/UX could use improvement
- 🔇 Audio issues and no sound

**Reported bugs**

- Stuck notes and MIDI issues
- Preset loading crashes
- Restore purchases not working
- Incompatibility with certain DAWs

**Requested features**

- Add custom wavetable support
- Improve MIDI mapping and MPE functionality
- Optimize performance on older devices
- Streamline preset management and browsing


### KORG iMono/Poly

[App page](https://appshunter.io/ios/app/korg-imonopoly/id1256218493)

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:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Expansion Factory Pack | $4.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- Cannot restore expansion pack
- Cannot find store tab
- Scale selection broken
- User scale does nothing
- MIDI unstable

**Requested features**

- AUv3 support
- Adaptive Cubasis 3 AUv3
- More iMPC integration
- Transfer patches to desktop VST
- Store preset files on device/flash drive


## Frequently asked questions

### Is SynthMaster One free?

SynthMaster One costs $9.99, and also offers in-app purchases.

### Is KORG iMono/Poly free?

KORG iMono/Poly costs $29.99, and also offers in-app purchases.

### Which has better reviews, SynthMaster One or KORG iMono/Poly?

SynthMaster One is rated higher. SynthMaster One averages 4.7 out of 5 from 743 ratings, while KORG iMono/Poly averages 4.3 from 84 ratings.

### Do SynthMaster One or KORG iMono/Poly have ads?

Neither SynthMaster One nor KORG iMono/Poly shows ads.

### Which is updated more often, SynthMaster One or KORG iMono/Poly?

SynthMaster One ships an update every 2 months, and KORG iMono/Poly every 2 months. Most recently, SynthMaster One was updated on October 24, 2026 and KORG iMono/Poly on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*