# iVoxel vs Agonizer

The clearest difference is price: iVoxel at $6.99 against Agonizer's $19.99. iVoxel also leads on in-app purchases (none vs 3). Agonizer's advantage is rating (4.8 vs 3.3) and review sentiment (79% vs 55%). On update cadence, ads, device support and iOS requirement there is nothing between them.

iVoxel costs $6.99 and Agonizer $19.99 up front. Agonizer sells 3 one-off in-app purchases. iVoxel asks for nothing beyond the download.

Agonizer holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: Agonizer has 203 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 55% of iVoxel's written reviews are positive against 79% of Agonizer's.

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on September 25, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | iVoxel | Agonizer |
| --- | --- | --- |
| Price | **$6.99** | $19.99 |
| Rating | [3.3 (17 ratings)](https://appshunter.io/ios/app/ivoxel/id382428641/reviews) | **[4.8 (203 ratings)](https://appshunter.io/ios/app/agonizer/id1499426175/reviews)** |
| Number of ratings | 17 | **203** |
| Positive reviews | 54.9% of reviews | **78.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | Every 5 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 46 MB | 362 MB |
| Requires iOS | 12.0 | **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

### iVoxel

[App page](https://appshunter.io/ios/app/ivoxel/id382428641)

This app transforms your voice into a singing machine using a powerful vocoder and synthesizer. It allows real-time voice manipulation, pitch correction, and the creation of unique vocal effects from recorded speech.

**Highlights:** Real-time voice analysis and resynthesis, 20+2 Channel vocoder, Pitch follower and automatic tuning, Voice spectrum recorder (voxels), Included prerecorded voxels, Live keyboard playback of vocoded voice, Polyphonic synthesizer with analog waves

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🎵 Excellent sound quality and vocoder capabilities
- 💡 Innovative vocal sound design tool with unique spectral shaping
- 🎹 Versatile instrument for creating robot/Kraftwerk-style vocals
- 👍 Intuitive once users understand the interface
- 🎧 Works well with built-in microphone for live vocoding

**What reviewers complain about**

- 🐛 Frequent crashes and stability issues across iOS versions
- ❌ Poor documentation and unclear user interface
- 🔇 Volume levels inconsistent - too quiet or too loud
- ⚠️ Unreliable audio input/output routing
- 🚫 Limited microphone compatibility and connection issues

**Reported bugs**

- App crashes on launch or during use
- Hangs when changing presets or settings
- Random background noise and clicking sounds
- Microphone input not recognized or working intermittently
- No sound output in standalone or Audiobus mode

**Requested features**

- AU v3 plugin support for modern DAW integration
- Audiobus 3 and IAA (Inter-App Audio) support
- Core MIDI support beyond Akai controllers
- Lightning to USB audio interface compatibility
- Custom word/text input for voice synthesis


### 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 iVoxel free?

iVoxel costs $6.99, with no in-app purchases.

### Is Agonizer free?

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

### Which has better reviews, iVoxel or Agonizer?

Agonizer is rated higher. iVoxel averages 3.3 out of 5 from 17 ratings, while Agonizer averages 4.8 from 203 ratings.

### Do iVoxel or Agonizer have ads?

Neither iVoxel nor Agonizer shows ads.

### Which is updated more often, iVoxel or Agonizer?

iVoxel ships an update every 5 months, and Agonizer every 5 months. Most recently, iVoxel was updated on September 25, 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.*