# Kauldron Synthesizer — Smart Analog Modeling Synth

> AI-powered analog modeling synthesizer with intelligent preset generation and deep modulation. (iPhone/iPad app by Yonac Inc..)

- Source: https://appshunter.io/ios/app/kauldron-synthesizer/id1292510609 (this page in markdown: same URL + `.md`)
- Developer: [Yonac Inc.](https://appshunter.io/developer/288670023)
- Category: Music
- Price: $9.99
- Rating: 4.60/5 from 136 App Store ratings · 74 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 32 MB
- Languages: American English
- Released: 2017-11-15
- Data updated: 2026-08-21
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/kauldron-synthesizer/id1292510609/reviews.md

## What is Kauldron Synthesizer?

Kauldron is where classic warmth meets Artificial Intelligence. One of our toniest and punchiest synths, Kauldron features a completely new analog modeling technology. The full spectrum of rich synth textures is bolstered by the groundbreaking SPAWN intelligent preset generation system that allows new patches to be created at the touch of a button. Abounding with pure hard-hitting tones, Kauldron requires little to no FX or production gimmicks to sound big.

Kauldron is designed with modulation and fine dynamic control in mind. The two fully-featured LFOs and the mod envelope combine with a wide variety of MIDI learnable controls to manipulate multiple parameters. Everything is easily set up in a clearly laid out ‘mod matrix.’ The dual XY-pads can be used for controlling modulation or a wide range of synth parameters. MIDI aftertouch can be routed via the matrix for even greater control over expression and tonality.

Kauldron also debuts the next generation of our Artificial Intelligence preset creation system, SPAWN². Completely reimagining the groundbreaking SPAWN algorithms in our hugely popular Magellan, the new SPAWN² gives you unprecedented control over generating presets. In the expert mode, you can accomplish anything from subtle ‘variations on a theme’ to bold new sounds. In the basic mode, where Kauldron does all the thinking, you get preset after usable preset with just a touch. This is not simple randomization: it is the power of A.I. put to benevolent use!

Kauldron also includes its AUv3 plugin version so that you can seamlessly run multiple instances in your favorite DAW. Powerful arp with both live & program modes; comprehensive MIDI features with effortless MIDI learn;  over 900 presets; recording, sharing, these are just some of the features brewing inside Yonac’s Kauldron.

Selected specs include,

SYNTH

• 3 analog modeling oscillators w/ multiple waveforms & true PWM
• FM via Osc 2
• Maximizer module with drift, spread & voice count for huge, stereophonic all-synth sounds
• New vAnalog filter design w/ ‘dirt’ overload for even warmer, harmonically complex tones
• Dedicated filter ADSR envelope
• Filter tracking, contour & more
• Pink/white noise generator
• Osc. phase reset & sync
• Retro & modern glide algorithms
• Virtual VCA envelope with 2 attack types
• Poly/mono operation
• Legato mode for buttery smooth passages
• Extensive modulation options via the ‘mod matrix’
• 2 LFOs w/ BPM sync, keytracking, trigger mode & more
• Assignable mod envelope
• 23 mod targets
• 11 mod controllers, including aftertouch, velocity & keytracking
• 2 XY-Pads for controlling mod targets or synth parameters
• Arpeggiator with live & program modes, 11 algorithms, gate, swing, note value, octaving & more
• Stereo mod effect with chorus & flanger modes
• BPM-syncable stereo delay
• Studio quality reverb w/ 7 room types, damping, time & mix
• 900+ presets in a wide variety of styles & sounds

SPAWN²

• Automatic preset generation via artificial intelligence
• Generate infinite new, usable presets at the touch of a button
• Expert mode lets specify Variation & Autonomy for each major synth module
• 3 unique A.I. algorithms
• Auto arp programming in any listed scale

PRO FEATURES

• AUv3 - use as Audio Unit instrument plugin on iPad & iPhone
• Fullscreen AU mode
• Extensive MIDI: MIDI learn, aftertouch, MIDI CC map save/share, KB mapping, program changes & more

APP

• iPhone & iPad Compatibility
• Powerful YPAT2 preset management system
• Classic or ribbon key controller
• Ribbon controller: Poly aftertouch into Kauldron
• Ribbon controller: Settable musical key & scale
• Classic KB: Velocity w/ sensitivity setting
• Tapedeck: Record, loop & share
• Metronome
• Tap BPM

## Key features

- AI-powered preset generation (SPAWN²)
- Analog modeling oscillators
- Extensive modulation matrix
- Dual XY-pads for control
- Powerful arpeggiator
- AUv3 plugin support
- Over 900 presets

## What do users think of Kauldron Synthesizer?

Overall sentiment: positive

**Pros**

- ✨ Warm and rich sound
- 👍 Easy to use interface
- 💡 Great presets included
- 🚀 Powerful sound engine
- 🌟 High quality emulation
- 🎶 Versatile sound capabilities
- 📱 AUv3 compatible
- 🔊 Massive sound
- 🎹 Good arpeggiator
- 🔥 Spawn system for variations
- 💰 Great value for price
- 💻 Intuitive controls
- 👌 High quality development

**Cons**

- 🐛 Buggy AUv3 implementation
- 🔊 Shrill noise issue
- 🔇 No Bluetooth speaker support
- ⚠️ Strange behavior/no reset
- 📉 Lacks oomph/personality
- 🐌 Slow on older iPads
- 🔌 Fails with iConnectivity interface

**Commonly reported bugs**

- Oscillators cannot be set to -1 octave
- Shrill noise
- No Bluetooth speaker output
- Fails to reload with Logic projects
- Cannot load into Logic Pro
- Starts and quits on latest iOS
- AUv3 bug: receives notes regardless of track selection
- AUv3 implementation flaky, random crashes
- AUv3: plays all instances simultaneously
- Bug with Garageband: duplicates patterns
- MIDI learn functions not saved
- Sometimes glitchy
- XY pad movements not recorded as automation
- CPU killer on iPad 4
- No function to share sounds

**Most requested features**

- Bring synths/effects to macOS
- Mac App version
- More comprehensive FX section (distortion/saturation)
- MIDI-out for arpeggiator
- Drum machine, PAD launcher, DAW
- Browser download feature
- Sequencer in Kauldron
- Effects tool
- Version history
- More developer responses/support
- Dark mode option

## Recent user reviews (10 of 74)

All indexed reviews: https://appshunter.io/ios/app/kauldron-synthesizer/id1292510609/reviews.md

### 5/5 — Long time Synth

*2026-04-30*

Habe ihn schon lange und jetzt mal wieder hervorgeholt. Ein toller Synth mit vielen Presets die geilen Pads und voll AuV3 kompatibel.
👍

### 5/5 — Great sounding synth!

*2025-12-22, version 2.0*

Please bring all your synths and effects to macOS!

### 5/5 — Xmas update bug

*2025-12-22*

There’s a bug preventing oscillators from being set at -1 octave. Apart from that an awesome update to one of my favourite synths on iOS.

### 5/5 — Mac App Please?

*2025-05-05, version 1.1*

Love it. Would love to use it on Mac as well!

### 5/5 — Warmth beyond words!

*2025-01-18, version 1.1*

It’s no joke and no exaggeration to say that this synth has an unusually warm sound and feel to it.  It’s almost odd how good this synth sounds, even on the simplest patches.  Yet, this is not just a typical Moog copy.  It definitely has its own feel and character and if you spend some time with it, you’ll be amazed at how well it fits into a mix.  Thanks.

### 2/5 — Bug Key continue 2025 !!!

*2024-12-26*

SHRILL NOISE!!!

### 5/5 — I can’t just get it, why am I reviewing this so late

*2024-08-02*

Yonac, is the leviathan reincarnation of Moog, 

This is the time, where the new bloodline  Will rule the world!

Goodbye old friend, you’ve been an amazing friend, but Yonac is us!

### 1/5 — No Bluetooth Speaker

*2024-05-30, version 1.1*

All my other synths on my iPad come out my IK iLoud speakers via Bluetooth .. this one doesn’t :(

### 5/5 — Bug in Logic

*2023-09-14, version 1.1*

In Logic it fails to reload with projects. It’s the only plug-in with this problem.
I love this synth so I hope the issue is resolved soon.

### 3/5 — Won’t load into Logic Pro

*2023-09-05*

It’s been working and all the sudden today it says it can’t load into Logic Pro and to contact the manufacturer.

## Frequently asked questions about Kauldron Synthesizer

### What does Kauldron Synthesizer do?

Kauldron is a powerful synthesizer app that combines classic analog warmth with artificial intelligence. It features advanced analog modeling technology for rich synth textures and an intelligent preset generation system called SPAWN² that creates new patches at the touch of a button.

### What are the key features of Kauldron Synthesizer?

Key features include AI-powered preset generation (SPAWN²), three analog modeling oscillators with multiple waveforms, extensive modulation options via a mod matrix, dual XY-pads for control, a powerful arpeggiator, and AUv3 plugin support for use in DAWs. It also comes with over 900 presets.

### How much does Kauldron Synthesizer cost?

Based on the provided information, Kauldron Synthesizer is a paid application. There are no mentions of free trials, subscriptions, or in-app purchases, indicating a one-time purchase model.

### What are some common use cases for Kauldron Synthesizer?

This app is ideal for creating a wide range of synth textures, from classic warm tones to cutting-edge sounds. It's useful for live performance, studio production within a DAW, sound design for electronic music, and exploring new sonic possibilities with its AI-driven preset generation.

### Is Kauldron Synthesizer compatible with other music software?

Yes, Kauldron Synthesizer includes an AUv3 plugin version, allowing it to be seamlessly run within your favorite Digital Audio Workstations (DAWs). This enables you to integrate its unique sounds into your existing music production workflows.

## Version history (last 3 releases)

### 2.0 — 2025-12-22

This big, bundled Kauldron 2.0 update includes extensive AUv3 related improvements,

• Modernized AUv3 MIDI handling
• Adds parameter automation support
• More robust AUv3 behavior
• Improved multi-instance operation
• Enhanced DAW compatibility

As well as many system-level updates,

• Improved signal generation algorithms
• Enhancements to the SPAWN system
• Optimizations in the front end & the synth engine
• Improvements to the MIDI system
• Increased stability
• iOS 26 support
• Drops IAA support, because the technology is deprecated.
• Other improvements & optimizations

### 1.1 — 2022-02-13

• Improves compatibility with certain AUv3 hosts
• Updates related to iOS 15
• Advanced MIDI -> MIDI In & MIDI Input Devices preferences are recalled in AUv3 state
• Other optimizations and improvements

### 1.0 — 2017-11-15

This app has been updated by Apple to display the Apple Watch app icon.

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## More apps by Yonac Inc.

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All apps by Yonac Inc.: https://appshunter.io/developer/288670023

## Related topics

[synthesis forum 2025](https://appshunter.io/ios/topics/synthesis-forum-2025) · [synthesizer electronic](https://appshunter.io/ios/topics/synthesizer-electronic)

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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 2026-08-21.*