# iImprov vs OnKey

The clearest difference is review sentiment: iImprov at 100% against OnKey's 0%. iImprov also leads on rating (4.9 vs 3.0) and ratings volume (7 vs 2). OnKey's advantage is update cadence (every 2 months vs every 32 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

iImprov costs $3.99 and OnKey $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iImprov holds the better App Store score, 4.9 against 3.0. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews point the same way: 100% of iImprov's written reviews are positive against 0% of OnKey's.

iImprov ships an update every 32 months, OnKey every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | iImprov | OnKey |
| --- | --- | --- |
| Price | **$3.99** | $4.99 |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/iimprov-bebop/id572415820/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/onkey-scale-practice/id1638204692/reviews) |
| Number of ratings | **7** | 2 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 19 MB | 2 MB |
| Requires iOS | **8.0** | 14.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jazz Apps Mobile LLC](https://appshunter.io/developer/421582808) | [Rea Meir](https://appshunter.io/developer/1638204694) |

## What reviewers say

### iImprov

[App page](https://appshunter.io/ios/app/iimprov-bebop/id572415820)

Explore the language of Bebop with comprehensive lessons and interactive jam-alongs. Learn to master bebop scales, develop longer phrases, and practice chord substitutions with tempo-adjustable audio examples and transposable notation.

**Highlights:** Bebop scale realization, Phrase development techniques, Turnarounds and chord substitutions, Confirmation sequence breakdown, I Got Rhythm changes practice, Tempo-adjustable jam-alongs, Transposable notation

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

**In-app purchases:** none


### OnKey

[App page](https://appshunter.io/ios/app/onkey-scale-practice/id1638204692)

This app generates readable, note-based exercises for practicing scales and chords. It's ideal for musicians of all levels looking for a focused and efficient way to improve their technique and theory knowledge without manual preparation.

**Highlights:** Generate note-based exercises, Select scale or chord type, Transpose to any key, Set range and clef, Choose from various patterns, Add note names and time signatures

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

**In-app purchases:** none


## Frequently asked questions

### Is iImprov free?

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

### Is OnKey free?

OnKey costs $4.99, with no in-app purchases.

### Which has better reviews, iImprov or OnKey?

iImprov is rated higher. iImprov averages 4.9 out of 5 from 7 ratings, while OnKey averages 3.0 from 2 ratings.

### Do iImprov or OnKey have ads?

Neither iImprov nor OnKey shows ads.

### Which is updated more often, iImprov or OnKey?

iImprov ships an update every 32 months, and OnKey every 2 months. Most recently, iImprov was updated on November 1, 2026 and OnKey on November 3, 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.*