# Jazzhacker Scales for Guitar vs Impro Master

The clearest difference is price: Impro Master at Free against Jazzhacker Scales for Guitar's $4.99. Impro Master also leads on update cadence (every 2 months vs every 9 months). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Impro Master is free to download; Jazzhacker Scales for Guitar costs $4.99 up front. Jazzhacker Scales for Guitar sells 1 one-off in-app purchase and Impro Master sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Jazzhacker Scales for Guitar ships an update every 9 months, Impro Master every 2 months. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Jazzhacker Scales for Guitar | Impro Master |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[4.6 (46 ratings)](https://appshunter.io/ios/app/impro-master/id1552035106/reviews)** |
| Number of ratings | — | **46** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 86 MB | 190 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JAZZHACKER LLC](https://appshunter.io/developer/1469766546) | [Luis Gimenez Alvarez](https://appshunter.io/developer/1552035108) |

## What reviewers say

### Jazzhacker Scales for Guitar

[App page](https://appshunter.io/ios/app/jazzhacker-scales-for-guitar/id1469766547)

This app provides a comprehensive visual reference for guitar scales and modes, featuring 340 illustrations with fretboard diagrams. Users can explore various scales and keys, create custom slideshows for practice, and utilize an adjustable metronome.

**Highlights:** 340 scale and mode illustrations, Guitar fretboard diagrams, Customizable slideshows, Adjustable metronome, Full-screen viewing, Support for all keys and scales

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to add more scales | $2.99 | one-time |


### Impro Master

[App page](https://appshunter.io/ios/app/impro-master/id1552035106)

This app helps musicians practice improvisation and compose chord progressions with AI-generated sequences and realistic instrument playback. It offers customizable parameters, various musical styles, and tools for both beginners and professionals.

**Highlights:** AI chord progression generation, Realistic instrument playback, 16 musical styles, Customizable parameters, Load and save progressions, Light & Dark Mode

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock the Full Version | $6.99 | one-time |


## Frequently asked questions

### Is Jazzhacker Scales for Guitar free?

Jazzhacker Scales for Guitar costs $4.99, and also offers in-app purchases.

### Is Impro Master free?

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

### Do Jazzhacker Scales for Guitar or Impro Master have ads?

Neither Jazzhacker Scales for Guitar nor Impro Master shows ads.

### Which is updated more often, Jazzhacker Scales for Guitar or Impro Master?

Jazzhacker Scales for Guitar ships an update every 9 months, and Impro Master every 2 months. Most recently, Jazzhacker Scales for Guitar was updated on October 8, 2026 and Impro Master on October 15, 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.*