# SynthMaster One — Powerful wavetable synth

> Powerful wavetable synthesizer app with extensive sound design capabilities and cross-platform sync. (iPhone/iPad app by KV331 Audio.)

- Source: https://appshunter.io/ios/app/synthmaster-one/id1254353266 (this page in markdown: same URL + `.md`)
- Developer: [KV331 Audio](https://appshunter.io/developer/944155925)
- Category: Music
- Price: $2.99 with in-app purchases (on sale, was $9.99)
- Rating: 4.70/5 from 740 App Store ratings · 206 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 402 MB
- Languages: American English
- Released: 2018-06-27
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/synthmaster-one/id1254353266/reviews.md

## What is SynthMaster One?

SynthMaster One iOS is KV331 Audio's first full blown universal synth app on iOS platform. It's a powerful wavetable synth with an intuitive workflow. With its simple layout, rich wavetable/waveform content and inspiring factory presets library, designing new sounds with SynthMaster One iOS is a joy.

SynthMaster One iOS is feature wise identical to the desktop version except the following:

* 16 voice polyphony (32 for the desktop version)
* Comes with 650 presets (1250 for the desktop version)

FEATURES

* Universal App: SynthMaster One is now a universal standalone/AUv3 synth app running on iPhone 7 and above.

* 650 Factory Presets: SynthMaster One iOS comes with inspiring factory presets from a world class team of sound designers: Arksun, Aiyn Zahev, BigTone Studios, Brian Transeau, Bluffmunkey, Bulent Biyikoglu, Gercek Dorman, Dejavu Sound, Fragment Audio, Kurt Ader, Mirko Ruta, Nori Ubukata, Rob Lee, Ufuk Kevser, Selcuk Ergen, The Machine, Vandalism Sound, Venus Theory, Vorpalsound and Xenos Soundworks

* AUv3: SynthMaster One iOS supports AudioUnits V3, allowing multiple instances to run under supporting DAW apps like GarageBand, Cubasis or Beat Maker. 

* Files App Integration: Easily import/export presets, waveforms or scales using the common file browser UI (requires iOS 11+).

* Real-time Modulation Feedback: See in real-time how modulation sources and targets change. This is a very helpful feature when designing sounds!

* Cross Platform Cloud Synchronization: Easily synchronize your SynthMaster One related data across multiple platforms (Windows, MacOS, iPad, iPhone)

* Semi-Modular Architecture: For each SynthMaster One instance, there are 2 oscillators with 2 sub oscillators, 2 Filters,  4 ADSR Envelopes, 3 LFOs, a powerful 16 step arpeggiator/sequencer and also 11 different effects that can be inserted on to 6 FX insert slots. The sub oscillators can be connected to the oscillators in 5 different modes which let you use it as a regular sub oscillator or do complex modulations such as ring modulation, amplitude modulation, phase modulation or frequency modulation.

* 32 Step Arpeggiator/Sequencer: The arpeggiator in SynthMaster One features classic arpeggiator modes such as Up, Down, UpDown, DownUp, UpDown2, DownUp2, AsPlayed as well as Sequence, Chord and Arpeggiate modes. 

* Wavetable Synthesis: SynthMaster One implements true wavetable synthesis which opens up new possibilities for sound design. It comes with a rich content library with hundreds of waveforms and wavetables.

* Stereo Oscillators with up to 16 voices Unison: Each of the 2 oscillators in SynthMaster One have stereo output, and can have up to 16 voices "unison". Using the "voices", "voices mix", "detune curve", "detune spread", "pan stread", "tone spread" and "phase spread" parameters, each oscillator can generate a rich "supersaw" type sound.

* Zero Delay Feedback Filters: All of the 4 filter categories in SynthMaster One are developed using the zero delay feedback filter technology. With advanced filter parameters like input gain, drive, acid, filter nonlinearities and up to 4 times oversampling you can get that "analog" sound from the filters!

* Rich Set of Effects: SynthMaster One features 11 different effect types: Distortion, LoFi, Ensemble, Phaser, 6 Band EQ, Compressor, Vocoder, Delay, Chorus, Tremolo, Reverb.

* Microtuning: SynthMaster One supports Scala tuning, so tuning can be set either for each preset or globally by loading from a Scala tuning file. SynthMaster One comes with 300+ scales ranging from 5 note equal tempered scales to 12 note alternate tuning scales.

* Preset Browser: SynthMaster One features a comprehensive preset browser with separate search criterias for instrument type, preset attributes, music style or preset author.

SUPPORTS

* All 64-bit iPad devices
* AUv3 Audio Unit Extensions
* Note-per-channel MIDI controllers (MPE)
* Ableton Link
* Bluetooth LE MIDI Controllers
* AirDrop

## Key features

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

## Pricing and in-app purchases

Base price: $2.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Desktop Presets Upgrade | $3.99 | one-time |
| BigTone Club Construction Set | $2.99 | one-time |
| True Trance Sounds Volume 1 | $2.99 | one-time |
| Vandalism Future House | $2.99 | one-time |
| NatLife Retrowave Sounds Vol.1 | $2.99 | one-time |
| Demis Hellen Euphoric Trance | $2.99 | one-time |
| Venus Theory Trap Sounds | $2.99 | one-time |
| Vandalism Shocking Future Bass | $2.99 | one-time |
| NatLife Progressive&Deep Vol.1 | $2.99 | one-time |
| SM One Expansions Bundle | $14.99 | one-time |
| Bluffmunkey Cinematic Sounds | $4.99 | one-time |


## What do users think of SynthMaster One?

Overall sentiment: positive

**Pros**

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

**Cons**

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

**Commonly reported bugs**

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

**Most requested features**

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

## Recent user reviews (10 of 206)

All indexed reviews: https://appshunter.io/ios/app/synthmaster-one/id1254353266/reviews.md

### 5/5 — Nicht nur auf dem iPad sehr gut

*2026-04-23*

Ist auf meinem iPad Setup Number One so ein toll klingender Synthi mit einem super Arp und 2500 Presets  in der Vollaustattung findet man nirgends. Bitte Updates und pflegen weiterhin.
Ein x/y Pad wie im Player würde ich mir noch wünschen.

### 4/5 — Good but

*2026-03-07, version 1.15.16*

Great synth except when I open it as a audio unit extension in garage band it won’t let me clear modulation off of presets pls fix

### 2/5 — Something changed, old projects sound different

*2026-02-07, version 1.15.16*

UGH!  Happens way too often with iOS synths.  Revisit an old project after a few years and the patches sound wrong.  I give up.

### 5/5 — AUv3 scheint vorhanden, geht bei mir nicht

*2025-12-24*

Ich finde es klasse, dass diese App als Universal veröffentlicht wurde. Auf meinem Mac läuft sie in Logic. Auf dem iPad wird sie nicht angezeigt. Ist für mich nicht so gut, da ich oft Ideen zuerst auf dem iPad festhalte und dann irgendwann auf Mac wechsle. Die vielen SynthMaster Versionen sind auch etwas verwirrend. Keine Ahnung, welcher Content auf welcher Version läuft.
Korrektur: Ist ein Namensproblem. Tritt in Logic iPad unter k331 als Hersteller auf statt KV331.

### 5/5 — Got all my desktop extensions on iPad!

*2025-12-14, version 1.15.16*

I got the desktop SynthMaster One free this December, and all the expansions for only $39. Then bought the iPad SynthMaster One for $4 and registered using my desktop serial number. Instantly got all the desktop goodies on my iPad without having to pay again. That’s how all desktop/IOS developers should do it!

### 5/5 — Consumers are dumb

*2025-11-11, version 1.15.16*

Just here to balance the rating because I hate unfair 1-star reviews

### 1/5 — No audio

*2025-09-21, version 1.15.16*

Can’t for the life of me work out how to get sound

### 4/5 — Sehr gut klingender Synth. Super Oberfläche. Ableton Link  Brocken

*2025-08-30*

Ich schon vor langer Zeit die Entwickler darauf aufmerksam gemacht das Ableton Link nicht mehr funktioniert. Deshalb nur 4 Sterne

### 3/5 — With BACKGROUND off, the synth doesn’t sound at all

*2025-08-21*

Even when not un background, it’s completely muted. 
If one MUST keep the option enabled, ti hear any sound at all, why to put a BACKGROUND Setting? 🤷‍♂️

### 5/5 — Superb!

*2025-05-03, version 1.15.16*

Very good quality synth engine. Can do vintage analog very well and cutting edge modern stuff very well also! Can’t wait for SM3 for iOS!!!

## Frequently asked questions about SynthMaster One

### What is SynthMaster One?

SynthMaster One is a powerful wavetable synthesizer application for iOS devices. It offers an intuitive workflow, a rich library of wavetables and waveforms, and a vast collection of inspiring factory presets for sound design. The app is designed to be a versatile tool for musicians and producers.

### What are the key features of SynthMaster One?

Key features include true wavetable synthesis, a semi-modular architecture with multiple oscillators and filters, a 32-step arpeggiator/sequencer, AUv3 support for integration with DAWs, real-time modulation feedback, and cross-platform cloud synchronization. It also comes with 650 factory presets.

### How much does SynthMaster One cost?

The app is available for free with in-app purchases. While the core functionality is accessible, additional content or features may be available for purchase within the app.

### What devices is SynthMaster One compatible with?

SynthMaster One is a universal app that runs on iPhone 7 and above. It supports AudioUnits V3, allowing it to be used within compatible Digital Audio Workstation (DAW) apps like GarageBand, Cubasis, or Beat Maker.

### Can I use SynthMaster One to create different types of sounds?

Yes, the app's wavetable synthesis and semi-modular architecture provide extensive sound design possibilities. You can create a wide range of sounds, from supersaw-style leads to complex evolving textures, utilizing its oscillators, filters, LFOs, and effects.

## Version history (last 5 releases)

### 1.15.16 — 2024-12-29

UI bug fixes

### 1.5.15 — 2024-01-18

fixed the crash that occurs on devices prior to iOS15

### 1.5.14 — 2024-01-13

bug fixes on Ableton link, gui issues and iOS17 compatibility

### 1.5.13 — 2023-05-24

Gui updates and bug fixes

### 1.5.12 — 2023-04-24

bugfixes

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## More apps by KV331 Audio

- [SynthMaster Player](https://appshunter.io/ios/app/synthmaster-player/id944155926)
- [SynthMaster One for iPhone](https://appshunter.io/ios/app/synthmaster-one-for-iphone/id1490902617)
- [SynthMaster 2](https://appshunter.io/ios/app/synthmaster-2/id1566704584)
- [SynthMaster 3 Player](https://appshunter.io/ios/app/synthmaster-3-player/id6757864669)

All apps by KV331 Audio: https://appshunter.io/developer/944155925

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*