# Additive Synth — Spectral Morphing Synthesizer

> Spectral Morphing Synthesizer (iPhone/iPad app by Snorkel Audio, Inh. Michael Kaisser.)

- Source: https://appshunter.io/ios/app/additive-synth/id6820988551 (this page in markdown: same URL + `.md`)
- Developer: [Snorkel Audio, Inh. Michael Kaisser](https://appshunter.io/developer/808807889)
- Category: Music, Education
- Price: $8.99
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 13 MB
- Released: 2026-10-23
- Data updated: 2026-11-09
- User reviews in markdown: https://appshunter.io/ios/app/additive-synth/id6820988551/reviews.md

## What is Additive Synth?

WHAT IT IS

Additive is a synthesizer that builds each sound up from harmonics instead of using a filter to cut it down. You can set every harmonic individually, then shape how it moves over time: some can pulse together while others drift, shimmer, or move in the opposite direction. This gives you control over every part of the spectrum and a large range of sounds, from shimmering pads and bell-like plucks to deep resonant basses. Start with a preset, generate a sound with Random, or build your own from the ground up.

WHAT IT DOES

* Harmonic bank: set up to 50 harmonic bands by drawing them, picking a shape, or generating a random spectrum. Every band is yours to change.
* Custom movement for every harmonic: give each band its own modulation depth, phase, and rate, so the movement happens inside the sound.
* Cutoff and resonance, uncoupled: Bands and Slope set the cutoff, while Bulk is a resonant peak you can place anywhere in the spectrum, independent of where cutoff sits.
* Morph: draw two spectra and move between them by hand, with an LFO, or with an envelope. A note can begin as one sound and become another.
* Modulation: four LFOs with nine shapes, including ones you can draw yourself, plus tempo sync and four envelopes.
* Voicing: Character, Detune, Chorus, Drive, and Stereo take the harmonics from pure sine waves to analog-leaning, distorted, or otherworldly.
* Play the spectrum: assign brightness, movement, Morph, or anything else to the XY pad and the Z slider, and explore the movement inside the spectrum yourself.
* Presets and Random: more than 100 presets cover basses, pads, textures, plucks, leads, bells, organs, keys, brass, and drones. Random generates a whole new sound, and you can adjust every detail to make it your own.
* FX: delay, reverb, drive, compression, and EQ are built in, so your sounds leave Additive finished.
* AUv3 and standalone: load Additive as an instrument in your host, or play it directly in the app with the on-screen keyboard and arp.
* Four themes: Hardware, Cobalt, Dark, and Light.

REQUIREMENTS

* iPad with iPadOS 15 or later
* An AUv3 host for the plugin, for example AUM (the standalone app needs none)

## Is Additive Synth safe?

Not enough ratings yet to assess Additive Synth.

## Is Additive Synth legit?

Additive Synth appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Additive Synth is 65 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/additive-synth/id6820988551/reviews.md

### 5/5 — Great synth that does things differently!

*2026-10-28*

I like this synth a lot, it is interesting to explore and create sounds with since it does sound design in a very different way from the other synths I have used. Also, I like the randomize function that gives you new patches instantly, some useful, some weird and out there.

## Version history (last 3 releases)

### 1.0.2 — 2026-11-09

Additive now runs on iPhone as well.

### 1.0.1 — 2026-10-24

- Expanded the arpeggiator with slower rates, a Chord shape, an Octave chord option and improved Latch.
- Reduced CPU use with repeated notes and added a Save CPU quality setting.
- Smoother sound when adjusting effects and voice controls.
- Added Free Bulk mode in Settings for more sound design possibilities.
- Improved delay tone and more accurate host-synced LFO timing.
- Reorganized the Settings page.
- Clearer harmonic bank displays.
- Updated several factory presets.

### 1.0.0 — 2026-10-24

No release notes.

## More apps by Snorkel Audio, Inh. Michael Kaisser

- [Little Arp Monster](https://appshunter.io/ios/app/little-arp-monster/id6778352056)
- [Little Drum Machine](https://appshunter.io/ios/app/little-drum-machine/id6787214757)
- [Disto Disco](https://appshunter.io/ios/app/disto-disco/id6807508525)

All apps by Snorkel Audio, Inh. Michael Kaisser: https://appshunter.io/developer/808807889

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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 2026-11-09.*