# Agonizer vs Opera GO

The clearest difference is price: Opera GO at Free against Agonizer's $7.99. Opera GO also leads on in-app purchases (none vs 3) and update cadence (every 2 weeks vs every 5 months). On ads, device support and iOS requirement there is nothing between them.

Opera GO is free to download; Agonizer costs $7.99 up front. Agonizer sells 3 one-off in-app purchases. Opera GO asks for nothing beyond the download.

Agonizer ships an update every 5 months, Opera GO every 2 weeks. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Agonizer | Opera GO |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.8 (203 ratings)](https://appshunter.io/ios/app/agonizer/id1499426175/reviews)** | — |
| Number of ratings | **203** | — |
| Positive reviews | 78.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 362 MB | 177 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [Velvet Flare](https://appshunter.io/developer/1732077632) |

## What reviewers say

### 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 |
| --- | --- | --- |
| Neon Nightmare Pack | $1.99 | one-time |
| Chrome Oasis Pack | $1.99 | one-time |
| Circuit Bender Pack | $1.99 | 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


### Opera GO

[App page](https://appshunter.io/ios/app/opera-go/id6478173013)

**In-app purchases:** none


## Frequently asked questions

### Is Agonizer free?

Agonizer costs $7.99, and also offers in-app purchases.

### Is Opera GO free?

Opera GO is free to download, with no in-app purchases.

### Do Agonizer or Opera GO have ads?

Neither Agonizer nor Opera GO shows ads.

### Which is updated more often, Agonizer or Opera GO?

Agonizer ships an update every 5 months, and Opera GO every 2 weeks. Most recently, Agonizer was updated on November 3, 2026 and Opera GO on October 27, 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.*