# Matrix Vocoder vs Agonizer

The clearest difference is price: Matrix Vocoder at $5.99 against Agonizer's $19.99. Matrix Vocoder also leads on in-app purchases (none vs 3) and chart position (#181 vs unranked). Agonizer's advantage is review sentiment (79% vs 42%) and rating (4.8 vs 4.3). On ads and device support there is nothing between them.

Matrix Vocoder costs $5.99 and Agonizer $19.99 up front. Agonizer sells 3 one-off in-app purchases. Matrix Vocoder asks for nothing beyond the download.

Agonizer holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Agonizer has 203 ratings behind it against 20, so its average is the more settled of the two. Written reviews point the same way: 42% of Matrix Vocoder's written reviews are positive against 79% of Agonizer's.

Matrix Vocoder ships an update every 15 months, Agonizer every 5 months. Both last shipped on September 22, 2026.

## The numbers

| Metric | Matrix Vocoder | Agonizer |
| --- | --- | --- |
| Price | **$5.99** | $19.99 |
| Rating | [4.3 (20 ratings)](https://appshunter.io/ios/app/matrix-vocoder/id1464318049/reviews) | **[4.8 (203 ratings)](https://appshunter.io/ios/app/agonizer/id1499426175/reviews)** |
| Number of ratings | 20 | **203** |
| Positive reviews | 41.7% of reviews | **78.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 5 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#181** | — |
| Size | 9 MB | 362 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Harry Gohs](https://appshunter.io/developer/382428644) | [Kai Aras](https://appshunter.io/developer/370820899) |

## What reviewers say

### Matrix Vocoder

[App page](https://appshunter.io/ios/app/matrix-vocoder/id1464318049)

**Currently charting:** #181 Top Paid · Music (US App Store)

Transform your voice into an electronic instrument with this app, simulating classic analog vocoder sounds. It analyzes input signals, performs spectral analysis, and reassembles synthetic speech using filter banks and replacement signals.

**Highlights:** 32 channel filterbank with analog filters, Stereophonic synthesis with alias-free oscillators, External carrier input, Voiced/Unvoiced detection and pitch tracking, Formant shift, Patchbay for channel connection, 16 internal oscillators for choir sounds

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Agonizer

[App page](https://appshunter.io/ios/app/agonizer/id1499426175)

This app is a monophonic synthesizer focused on bass sounds, developed with a synth bass expert. It features dual wavetable oscillators, a mangle section, and built-in stereo effects. It supports MPE controllers and various audio/MIDI connectivity options for standalone or app-to-app use.

**Highlights:** Monophonic synth engine for bass, Dual wavetable oscillators, Built-in stereo effects, MPE controller support, Standalone and AUv3 operation, 140+ factory presets

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chrome Oasis Pack | $3.99 | one-time |
| Circuit Bender Pack | $3.99 | one-time |
| Neon Nightmare Pack | $4.99 | one-time |

**What reviewers like**

- 🎵 Excellent sound quality and unique bass tones
- 🎨 Intuitive and well-designed user interface
- ⚙️ Powerful modulation and sound design capabilities
- 🎛️ Wobulator feature for creative bass manipulation
- 📦 Great presets included with the app

**What reviewers complain about**

- 🐛 Keyboard legato/mono-synth behavior inconsistent
- 🐛 Frequent crashes in host applications (AUM, Cubasis, Audiobus)
- 🐛 No sound output in GarageBand and some AU hosts
- 🐛 App freezes on splash screen with iOS 18.3
- 🐛 UI responsiveness issues and knob lag

**Reported bugs**

- Keyboard does not properly handle legato/mono-synth note priority
- Crashes in Audiobus, AUM, and Cubasis host applications
- No sound output when used as AUv3 plugin in hosts
- No sound in GarageBand integration
- App freezes on splash screen with iOS 18.3

**Requested features**

- Polyphony mode or toggle between mono and poly
- Envelope drawing capability instead of preset selection
- Menu-based waveform selection instead of cycling
- Arpeggiator function
- Preset browser search and favorites filter


## Frequently asked questions

### Is Matrix Vocoder free?

Matrix Vocoder costs $5.99, with no in-app purchases.

### Is Agonizer free?

Agonizer costs $19.99, and also offers in-app purchases.

### Which has better reviews, Matrix Vocoder or Agonizer?

Agonizer is rated higher. Matrix Vocoder averages 4.3 out of 5 from 20 ratings, while Agonizer averages 4.8 from 203 ratings.

### Do Matrix Vocoder or Agonizer have ads?

Neither Matrix Vocoder nor Agonizer shows ads.

### Which is updated more often, Matrix Vocoder or Agonizer?

Matrix Vocoder ships an update every 15 months, and Agonizer every 5 months. Most recently, Matrix Vocoder was updated on September 22, 2026 and Agonizer on September 22, 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.*