# Blue Jean vs Harmonica Study

The clearest difference is update cadence: Harmonica Study at every 4 days against Blue Jean's every 3 months. Blue Jean's advantage is iOS requirement (11.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Blue Jean sells 10 one-off in-app purchases and Harmonica Study sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Blue Jean ships an update every 3 months, Harmonica Study every 4 days. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Blue Jean | Harmonica Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/harmonica-study/id6747905963/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 40 MB | 113 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [BIG MEDYA TEKNOLOJI ANONIM SIRKETI](https://appshunter.io/developer/436618483) | [Filipe Maciel Lins](https://appshunter.io/developer/1748841098) |

## What reviewers say

### Blue Jean

[App page](https://appshunter.io/ios/app/blue-jean/id1084372557)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blue Jean - September 2014 | $1.99 | one-time |
| Blue Jean - September 2015 | $1.99 | one-time |
| Blue Jean - October 2014 | $1.99 | one-time |
| Blue Jean - October 2015 | $1.99 | one-time |
| Blue Jean - November 2015 | $1.99 | one-time |
| Blue Jean - December 2013 | $1.99 | one-time |
| Blue Jean - November 2014 | $1.99 | one-time |
| Blue Jean - November 2013 | $1.99 | one-time |
| Blue Jean - December 2014 | $1.99 | one-time |
| Blue Jean - December 2015 | $1.99 | one-time |


### Harmonica Study

[App page](https://appshunter.io/ios/app/harmonica-study/id6747905963)

Master the harmonica with real-time feedback on scales and arpeggios. This app provides guided practice, interactive charts, and a built-in metronome to improve your timing and pitch accuracy. Suitable for all skill levels, from beginners to advanced players.

**Highlights:** Real-time note feedback, Practice scales and arpeggios, Interactive harmonica charts, Built-in metronome, Adjustable tempo and repetition, Backing playback

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Weekly Premium | $7.99 | per 7 days |
| Yearly Premium | $24.99 | per year |
| Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is Blue Jean free?

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

### Is Harmonica Study free?

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

### Do Blue Jean or Harmonica Study have ads?

Neither Blue Jean nor Harmonica Study shows ads.

### Which is updated more often, Blue Jean or Harmonica Study?

Blue Jean ships an update every 3 months, and Harmonica Study every 4 days. Most recently, Blue Jean was updated on September 24, 2026 and Harmonica Study on September 23, 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.*