# Chaos Audio vs Harmonize Trainer

The clearest difference is price: Chaos Audio at Free against Harmonize Trainer's $1.99. Chaos Audio also leads on update cadence (every 9 days vs every 3 months). Harmonize Trainer's advantage is in-app purchases (none vs 41) and chart position (#113 vs unranked). On ads, device support and iOS requirement there is nothing between them.

Chaos Audio is free to download; Harmonize Trainer costs $1.99 up front. Chaos Audio sells 41 one-off in-app purchases. Harmonize Trainer asks for nothing beyond the download.

Chaos Audio ships an update every 9 days, Harmonize Trainer every 3 months. Both last shipped on October 9, 2026.

## The numbers

| Metric | Chaos Audio | Harmonize Trainer |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.6 (27 ratings)](https://appshunter.io/ios/app/chaos-audio/id1522790206/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 94.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Best chart rank | — | **#113** |
| Size | 152 MB | 31 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chaos Audio](https://appshunter.io/developer/1522790208) | [Stephen Michael Cesler](https://appshunter.io/developer/1688595725) |

## What reviewers say

### Chaos Audio

[App page](https://appshunter.io/ios/app/chaos-audio/id1522790206)

This app allows users to control powerful guitar effects pedals and amp modelers, leveraging AI to create custom sounds from text descriptions. It offers a comprehensive platform for practice, recording, and performance, compatible with specific hardware.

**Highlights:** AI FX Builder for custom sound creation, Tone Shop for downloading third-party effects, Built-in tuner, 5-minute hands-free looper, Unlimited preset saving and sharing, Multi-effect chaining, Hands-free switching via Preset Control or MIDI

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

**In-app purchases (41)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Apollo | Free | one-time |
| JCVM Lite | $9.90 | one-time |
| Twin Classic Lite | $9.90 | one-time |
| Tweaker Lite | $9.90 | one-time |
| MORNING STAR | $9.99 | one-time |
| TALKING HEAD | $9.99 | one-time |
| Smooth Reverb by ChowDSP | $10.00 | one-time |
| Muff Drive by ChowDSP | $10.00 | one-time |
| Opto Phase by Chow DSP | $10.00 | one-time |
| Poly Octave | $10.00 | one-time |
| LUPAN | $12.99 | one-time |
| Schnobel Tone | $12.99 | one-time |
| Galileo | $14.90 | one-time |
| Constellation | $14.90 | one-time |
| Spring Reverb | $14.90 | one-time |
| SUPERNOVA | $14.90 | one-time |
| Tycho | $14.90 | one-time |
| Eclipse | $14.90 | one-time |
| ROTISSERY | $14.90 | one-time |
| Gravity | $14.90 | one-time |
| GEMINI | $14.90 | one-time |
| INVASION | $14.90 | one-time |
| PLUTO | $14.90 | one-time |
| Artemis | $14.90 | one-time |
| URSA MAJOR | $14.90 | one-time |
| ORBITER | $14.90 | one-time |
| URANUS | $14.90 | one-time |
| Cosmos | $14.90 | one-time |
| VOID | $14.90 | one-time |
| Luna | $14.90 | one-time |
| Astro | $14.90 | one-time |
| WORMHOLE | $14.90 | one-time |
| MARINER | $14.90 | one-time |
| PEGASUS | $14.90 | one-time |
| URSA MINOR | $14.90 | one-time |
| WARP SPEED | $14.90 | one-time |
| ODYSSEY | $14.90 | one-time |
| The Leveler by magnetophon | $19.49 | one-time |
| ARES | $19.90 | one-time |
| Dark Matter | $24.90 | one-time |
| Daily Driver | $27.90 | one-time |


### Harmonize Trainer

[App page](https://appshunter.io/ios/app/harmonize-trainer/id6781284983)

**Currently charting:** #113 Top Paid · Music (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is Chaos Audio free?

Chaos Audio is free to download, with in-app purchases available.

### Is Harmonize Trainer free?

Harmonize Trainer costs $1.99, with no in-app purchases.

### Do Chaos Audio or Harmonize Trainer have ads?

Neither Chaos Audio nor Harmonize Trainer shows ads.

### Which is updated more often, Chaos Audio or Harmonize Trainer?

Chaos Audio ships an update every 9 days, and Harmonize Trainer every 3 months. Most recently, Chaos Audio was updated on October 9, 2026 and Harmonize Trainer on October 9, 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.*