# Scales Lexicon vs iImprov

The clearest difference is rating: Scales Lexicon at 5.0 against iImprov's 3.0. Scales Lexicon also leads on review sentiment (86% vs 68%) and price ($2.99 vs $3.99). iImprov's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 26.5). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Scales Lexicon costs $2.99 and iImprov $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scales Lexicon holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 86% of Scales Lexicon's written reviews are positive against 68% of iImprov's.

Scales Lexicon ships an update every 24 months, iImprov every 28 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Scales Lexicon | iImprov |
| --- | --- | --- |
| Price | **$2.99** | $3.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/scales-lexicon/id418528535/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/iimprov-modal/id434112459/reviews) |
| Number of ratings | **5** | 2 |
| Positive reviews | **85.7% of reviews** | 68.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 24 months** | Every 28 months |
| Monetization | Paid | Paid |
| Size | 40 MB | 8 MB |
| Requires iOS | 26.5 | **15.6** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Patrick Q. Kelly](https://appshunter.io/developer/310068987) | [Jazz Apps Mobile LLC](https://appshunter.io/developer/421582808) |

## What reviewers say

### Scales Lexicon

[App page](https://appshunter.io/ios/app/scales-lexicon/id418528535)

This app provides a comprehensive library of musical scales with notation and audio playback. It offers transposition for various instruments and clefs, customizable rhythmic patterns, and the ability to export notation as PDFs. Practice scales with visual feedback on highlighted notes and piano keys.

**Highlights:** Over 100 musical scales, Audio playback with visual note highlighting, Transposition for multiple instruments and clefs, Customizable rhythmic patterns and octaves, PDF export of notation, Forward and backward scale playback

**In-app purchases:** none


### iImprov

[App page](https://appshunter.io/ios/app/iimprov-modal/id434112459)

This app helps jazz musicians of all levels master modal improvisation. It offers detailed explanations of theory, scale relationships, and practical exercises with audio and JAM-A-longs in various keys and styles. Tailored for modal tunes, it covers minor modal, 7 sus 4, and Major 7#4 progressions.

**Highlights:** Modal improvisation theory, Scale and chord relation explanations, Pentatonic scale usage, Audio and visual scale examples, Interactive JAM-A-longs, Adjustable tempo and instrument balance, Transposition selection

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

**In-app purchases:** none


## Frequently asked questions

### Is Scales Lexicon free?

Scales Lexicon costs $2.99, with no in-app purchases.

### Is iImprov free?

iImprov costs $3.99, with no in-app purchases.

### Which has better reviews, Scales Lexicon or iImprov?

Scales Lexicon is rated higher. Scales Lexicon averages 5.0 out of 5 from 5 ratings, while iImprov averages 3.0 from 2 ratings.

### Do Scales Lexicon or iImprov have ads?

Neither Scales Lexicon nor iImprov shows ads.

### Which is updated more often, Scales Lexicon or iImprov?

Scales Lexicon ships an update every 24 months, and iImprov every 28 months. Most recently, Scales Lexicon was updated on November 1, 2026 and iImprov on November 6, 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.*