# Addictive Synth vs Agonizer

The clearest difference is price: Addictive Synth at $6.99 against Agonizer's $19.99. Addictive Synth also leads on in-app purchases (none vs 3) and iOS requirement (6.0 vs 11.0). Agonizer's advantage is rating (4.8 vs 4.5) and ratings volume (203 vs 15). On review sentiment, update cadence and ads there is nothing between them.

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

Agonizer holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Agonizer has 203 ratings behind it against 15, so its average is the more settled of the two. Written reviews split almost evenly too, at 78% and 79% positive.

Addictive Synth ships an update every 4 months, Agonizer every 5 months. The most recent releases landed on June 9, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Addictive Synth | Agonizer |
| --- | --- | --- |
| Price | **$6.99** | $19.99 |
| Rating | [4.5 (15 ratings)](https://appshunter.io/ios/app/addictive-synth/id447072653/reviews) | **[4.8 (203 ratings)](https://appshunter.io/ios/app/agonizer/id1499426175/reviews)** |
| Number of ratings | 15 | **203** |
| Positive reviews | 78.1% of reviews | **78.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 47 MB | 362 MB |
| Requires iOS | **6.0** | 11.0 |
| Devices | iPad | **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

### Addictive Synth

[App page](https://appshunter.io/ios/app/addictive-synth/id447072653)

Create unique sounds and driving loops with a powerful wavetable synthesizer. Explore a vast sonic universe with dynamic oscillators, spectral noise generation, and intelligent randomizers. Play live with an onscreen keyboard or connect a MIDI controller.

**Highlights:** Dynamic wavetable synthesis, Spectral noise generator, Intelligent randomizer for sounds and arpeggios, Onscreen keyboard with live playing capabilities, MIDI keyboard compatibility, Programmable arpeggiator, Audiobus and Inter-app audio support

**In-app purchases:** none

**What reviewers like**

- 🎵 Unique additive synthesis sound palette
- 🎛️ Intuitive and clean interface design
- 🎲 Randomizer/dice feature for creative exploration
- 🎹 Excellent arpeggiator with extensive customization
- ✏️ Ability to draw custom waveforms and filters

**What reviewers complain about**

- 🔊 Harsh, metallic, or shrill sound character
- 🐛 Crashes on certain iOS versions
- ⏱️ Tempo drift and synchronization issues
- 🎹 Small, difficult-to-use on-screen controls
- 📡 Poor MIDI latency and responsiveness

**Reported bugs**

- App crashes upon opening on iOS 15.1
- Static/audio glitches on startup
- Keyboard width inconsistency across pages
- Stuck notes with external MIDI controllers
- Audio playback at 2x speed when pasting from certain apps

**Requested features**

- MIDI learn functionality
- Audiobus and IAA sync support
- MIDI clock/start/stop synchronization
- Ableton Link integration
- White/pink noise generator


### 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 Addictive Synth free?

Addictive Synth 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, Addictive Synth or Agonizer?

Agonizer is rated higher. Addictive Synth averages 4.5 out of 5 from 15 ratings, while Agonizer averages 4.8 from 203 ratings.

### Do Addictive Synth or Agonizer have ads?

Neither Addictive Synth nor Agonizer shows ads.

### Which is updated more often, Addictive Synth or Agonizer?

Addictive Synth ships an update every 4 months, and Agonizer every 5 months. Most recently, Addictive Synth was updated on June 9, 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.*