# KnowYourNeck vs Guitar Codex

The clearest difference is update cadence: Guitar Codex at every 2 days against KnowYourNeck's every 11 days. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. KnowYourNeck sells 2 in-app purchases, starting at $4.99 per month and Guitar Codex sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for KnowYourNeck against 5.0 for Guitar Codex. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

KnowYourNeck ships an update every 11 days, Guitar Codex every 2 days. Both last shipped on October 1, 2026.

## The numbers

| Metric | KnowYourNeck | Guitar Codex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/knowyourneck/id6780935661/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/guitar-codex/id6800162755/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 2 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 79 MB | 39 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Adam Rhodes](https://appshunter.io/developer/6780935663) | [CampCheck Interactive LLC](https://appshunter.io/developer/6800162757) |

## What reviewers say

### KnowYourNeck

[App page](https://appshunter.io/ios/app/knowyourneck/id6780935661)

Explore the interconnectedness of musical scales and arpeggios on a guitar fretboard. Visualize chord tones, target notes, and practice with visual overlays for backing tracks. Offers tools for learning intervals, scales, and chords, with advanced features for Pro users.

**Highlights:** Overlay multiple arpeggios, Identify target notes between chords, Play along with visual fretboard overlay, Visualize intervals and scales, Display chord voicings and inversions, Real-time pitch detection

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KnowYourNeck Pro | $4.99 | per month |
| KnowYourNeck Pro | $49.99 | per year |


### Guitar Codex

[App page](https://appshunter.io/ios/app/guitar-codex/id6800162755)

This app offers a comprehensive suite of tools for guitarists of all levels, from beginners to experienced players. It includes a tuner, metronome, interactive chord and scale libraries, and a structured 140-lesson course covering theory, technique, and songwriting.

**Highlights:** Chromatic tuner with multiple presets, Metronome with tap tempo, Interactive circle of fifths, Extensive chord and scale libraries, 140 structured lessons, Fretboard diagrams with color-coded notes

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Guitar Codex Pro | $9.99 | one-time |
| Pro to Complete Upgrade | $9.99 | one-time |
| Guitar Codex Complete | $19.99 | one-time |


## Frequently asked questions

### Is KnowYourNeck free?

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

### Is Guitar Codex free?

Guitar Codex is free to download, with in-app purchases available.

### Which has better reviews, KnowYourNeck or Guitar Codex?

KnowYourNeck and Guitar Codex are both rated 5.0 out of 5 on the App Store, from 3 and 3 ratings respectively.

### Do KnowYourNeck or Guitar Codex have ads?

Neither KnowYourNeck nor Guitar Codex shows ads.

### Which is updated more often, KnowYourNeck or Guitar Codex?

KnowYourNeck ships an update every 11 days, and Guitar Codex every 2 days. Most recently, KnowYourNeck was updated on October 1, 2026 and Guitar Codex on October 1, 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.*