# iImprov vs Guitar Permutation Trainer

The clearest difference is update cadence: Guitar Permutation Trainer at every 3 months against iImprov's every 32 months. Guitar Permutation Trainer also leads on price ($1.99 vs $3.99). iImprov's advantage is iOS requirement (8.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

iImprov costs $3.99 and Guitar Permutation Trainer $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iImprov ships an update every 32 months, Guitar Permutation Trainer every 3 months. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | iImprov | Guitar Permutation Trainer |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/iimprov-bebop/id572415820/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 19 MB | 2 MB |
| Requires iOS | **8.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jazz Apps Mobile LLC](https://appshunter.io/developer/421582808) | [Benjamin Chouinard](https://appshunter.io/developer/1826188450) |

## 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


### Guitar Permutation Trainer

[App page](https://appshunter.io/ios/app/guitar-permutation-trainer/id6748545844)

**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 Guitar Permutation Trainer free?

Guitar Permutation Trainer costs $1.99, with no in-app purchases.

### Do iImprov or Guitar Permutation Trainer have ads?

Neither iImprov nor Guitar Permutation Trainer shows ads.

### Which is updated more often, iImprov or Guitar Permutation Trainer?

iImprov ships an update every 32 months, and Guitar Permutation Trainer every 3 months. Most recently, iImprov was updated on October 29, 2026 and Guitar Permutation Trainer on October 28, 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.*