# Guitar Notation Pro vs Chaos Audio

The clearest difference is price: Chaos Audio at Free against Guitar Notation Pro's $149.00. Chaos Audio also leads on review sentiment (94% vs 56%) and rating (4.6 vs 4.1). Guitar Notation Pro's advantage is in-app purchases (none vs 41) and iOS requirement (13 vs 15.0). On ratings volume, ads and device support there is nothing between them.

Chaos Audio is free to download; Guitar Notation Pro costs $149.00 up front. Chaos Audio sells 41 one-off in-app purchases. Guitar Notation Pro asks for nothing beyond the download.

Chaos Audio holds the better App Store score, 4.6 against 4.1. Both are backed by a comparable volume of ratings — 24 and 27 respectively. Written reviews point the same way: 56% of Guitar Notation Pro's written reviews are positive against 94% of Chaos Audio's.

Guitar Notation Pro ships an update every 3 months, Chaos Audio every 2 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Guitar Notation Pro | Chaos Audio |
| --- | --- | --- |
| Price | $149.00 | **Free** |
| Rating | [4.1 (24 ratings)](https://appshunter.io/ios/app/guitar-notation-pro/id1144465456/reviews) | **[4.6 (27 ratings)](https://appshunter.io/ios/app/chaos-audio/id1522790206/reviews)** |
| Number of ratings | 24 | **27** |
| Positive reviews | 55.6% of reviews | **94.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 153 MB | 152 MB |
| Requires iOS | **13** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [嵩 张](https://appshunter.io/developer/1091921941) | [Chaos Audio](https://appshunter.io/developer/1522790208) |

## What reviewers say

### Guitar Notation Pro

[App page](https://appshunter.io/ios/app/guitar-notation-pro/id1144465456)

Compose, edit, and playback guitar sheet music scores with this powerful notation app. Supports multi-track tabs, chord charts, and various instruments. Export your compositions in industry-standard formats.

**Highlights:** Compose and edit sheet music, Multi-track tab support, Chord chart configuration, High-quality playback, Export to MusicXML, MIDI, PNG, PDF, Supports up to 8 staff

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Guitar Notation Pro free?

Guitar Notation Pro costs $149.00, with no in-app purchases.

### Is Chaos Audio free?

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

### Which has better reviews, Guitar Notation Pro or Chaos Audio?

Chaos Audio is rated higher. Guitar Notation Pro averages 4.1 out of 5 from 24 ratings, while Chaos Audio averages 4.6 from 27 ratings.

### Do Guitar Notation Pro or Chaos Audio have ads?

Neither Guitar Notation Pro nor Chaos Audio shows ads.

### Which is updated more often, Guitar Notation Pro or Chaos Audio?

Guitar Notation Pro ships an update every 3 months, and Chaos Audio every 2 weeks. Most recently, Guitar Notation Pro was updated on October 24, 2026 and Chaos Audio on October 25, 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.*