# Hex MIDI vs Harmonaut

The clearest difference is in-app purchases: Harmonaut at none against Hex MIDI's 1. Harmonaut also leads on update cadence (every 10 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Hex MIDI sells 1 one-off in-app purchase. Harmonaut asks for nothing beyond the download.

Hex MIDI ships an update monthly, Harmonaut every 10 days. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Hex MIDI | Harmonaut |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/harmonaut/id6784680994/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 95 MB | 117 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Trung Dung Hoang](https://appshunter.io/developer/1896778927) | [District One Mobile, LLC](https://appshunter.io/developer/812513884) |

## What reviewers say

### Hex MIDI

[App page](https://appshunter.io/ios/app/hex-midi-isomorphic-keyboard/id6771364879)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hex MIDI Pro | $12.99 | one-time |


### Harmonaut

[App page](https://appshunter.io/ios/app/harmonaut/id6784680994)

Create music by feel without needing music theory. This app generates rich chords and smooth progressions, allowing you to shape the mood with intuitive controls. Save and reorder your musical ideas effortlessly.

**Highlights:** Play by feel, no theory required, Shape mood with tension and brightness faders, Smooth voice leading for flowing progressions, Chords named for musicians, Save and reorder progressions, Works on iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hex MIDI free?

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

### Is Harmonaut free?

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

### Do Hex MIDI or Harmonaut have ads?

Neither Hex MIDI nor Harmonaut shows ads.

### Which is updated more often, Hex MIDI or Harmonaut?

Hex MIDI ships an update monthly, and Harmonaut every 10 days. Most recently, Hex MIDI was updated on October 4, 2026 and Harmonaut on October 8, 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.*