# Agonizer vs TB Flowtones

The clearest difference is price: TB Flowtones at $9.99 against Agonizer's $19.99. TB Flowtones also leads on in-app purchases (none vs 3). Agonizer's advantage is ratings volume (203 vs 39) and iOS requirement (11.0 vs 13.0). On rating, review sentiment, update cadence and ads there is nothing between them.

Agonizer costs $19.99 and TB Flowtones $9.99 up front. Agonizer sells 3 one-off in-app purchases. TB Flowtones asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Agonizer against 4.7 for TB Flowtones. That said, the two scores are not equally well evidenced: Agonizer has 203 ratings behind it against 39, so its average is the more settled of the two. Written reviews are what separate them: 78% of Agonizer's written reviews are positive against 83% of TB Flowtones's.

Agonizer ships an update every 5 months, TB Flowtones every 3 months. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Agonizer | TB Flowtones |
| --- | --- | --- |
| Price | $19.99 | **$9.99** |
| Rating | **[4.8 (203 ratings)](https://appshunter.io/ios/app/agonizer/id1499426175/reviews)** | [4.7 (39 ratings)](https://appshunter.io/ios/app/tb-flowtones/id1576472437/reviews) |
| Number of ratings | **203** | 39 |
| Positive reviews | 77.8% of reviews | **82.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 362 MB | 17 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [ToneBoosters](https://appshunter.io/developer/1472446500) |

## 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 |
| --- | --- | --- |
| 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


### TB Flowtones

[App page](https://appshunter.io/ios/app/tb-flowtones/id1576472437)

This virtual analog synthesizer app offers a true VA synthesis engine with analog-modeled filters and extensive modulation options. Create warm, analog-sounding music with a powerful architecture, diverse waveforms, and pro-grade effects. It also includes an integrated step sequencer and hundreds of presets.

**Highlights:** True virtual analog synthesis engine, Analog-modelled non-linear filters, Extensive modulation options, Pro-grade studio effects, Integrated step sequencer, Hundreds of presets and intelligent randomizer

**In-app purchases:** none


## Frequently asked questions

### Is Agonizer free?

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

### Is TB Flowtones free?

TB Flowtones costs $9.99, with no in-app purchases.

### Which has better reviews, Agonizer or TB Flowtones?

Agonizer is rated higher. Agonizer averages 4.8 out of 5 from 203 ratings, while TB Flowtones averages 4.7 from 39 ratings.

### Do Agonizer or TB Flowtones have ads?

Neither Agonizer nor TB Flowtones shows ads.

### Which is updated more often, Agonizer or TB Flowtones?

Agonizer ships an update every 5 months, and TB Flowtones every 3 months. Most recently, Agonizer was updated on October 1, 2026 and TB Flowtones on September 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*