# Jazz ScaleHelper vs Harmonaut

The clearest difference is review sentiment: Harmonaut at 100% against Jazz ScaleHelper's 50%. Harmonaut also leads on price (Free vs $5.99) and in-app purchases (none vs 11). Jazz ScaleHelper's advantage is iOS requirement (15.0 vs 17.0). On ads and device support there is nothing between them.

Harmonaut is free to download; Jazz ScaleHelper costs $5.99 up front. Jazz ScaleHelper sells 11 one-off in-app purchases. Harmonaut asks for nothing beyond the download.

Jazz ScaleHelper ships an update every 6 weeks, Harmonaut every 10 days. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Jazz ScaleHelper | Harmonaut |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/harmonaut/id6784680994/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 9 MB | 117 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Richard Williams](https://appshunter.io/developer/1792912830) | [District One Mobile, LLC](https://appshunter.io/developer/812513884) |

## What reviewers say

### Jazz ScaleHelper

[App page](https://appshunter.io/ios/app/jazz-scalehelper/id567707566)

Improve your musical instrument playing with interactive exercises and real-time feedback. Practice scales, modes, and arpeggios with scoring and performance analysis. Ideal for exam preparation and general skill enhancement.

**Highlights:** Interactive scale and arpeggio practice, Real-time performance scoring, Multiple practice modes (play any, choose, challenge), Supports Trinity Guildhall and ABRSM syllabuses, Wide range of scales, modes, and arpeggios, Supports multiple instruments, Multi-user support with saved history

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Saxophone TRINITY G4 | $0.99 | one-time |
| Saxophone TRINITY G7 | $0.99 | one-time |
| Saxophone ABRSM G1 to G3 | $0.99 | one-time |
| Saxophone ABRSM G4 | $0.99 | one-time |
| Saxophone ABRSM G5 | $0.99 | one-time |
| Trumpet ABRSM G1 to G3 | $0.99 | one-time |
| Trumpet ABRSM G4 | $0.99 | one-time |
| Trumpet ABRSM G5 | $0.99 | one-time |
| Clarinet TRINITY G1 to G8 | $2.99 | one-time |
| Flute TRINITY G1 to G8 | $2.99 | one-time |
| Saxophone TRINITY G1 to G8 | $2.99 | 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 Jazz ScaleHelper free?

Jazz ScaleHelper costs $5.99, and also offers in-app purchases.

### Is Harmonaut free?

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

### Do Jazz ScaleHelper or Harmonaut have ads?

Neither Jazz ScaleHelper nor Harmonaut shows ads.

### Which is updated more often, Jazz ScaleHelper or Harmonaut?

Jazz ScaleHelper ships an update every 6 weeks, and Harmonaut every 10 days. Most recently, Jazz ScaleHelper was updated on October 14, 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.*