# JamEngine vs Jazz Improv Practice & Scales

The clearest difference is update cadence: JamEngine at every 5 days against Jazz Improv Practice & Scales's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. JamEngine sells 1 one-off in-app purchase and Jazz Improv Practice & Scales sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

JamEngine ships an update every 5 days, Jazz Improv Practice & Scales every 2 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | JamEngine | Jazz Improv Practice & Scales |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Size | 149 MB | 4 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Orcun Keskin](https://appshunter.io/developer/1681326325) | [Linh Phan Nhat Khanh](https://appshunter.io/developer/1777727575) |

## What reviewers say

### JamEngine

[App page](https://appshunter.io/ios/app/jamengine/id6759828737)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JamEngine Pro | $8.99 | one-time |


### Jazz Improv Practice & Scales

[App page](https://appshunter.io/ios/app/jazz-improv-practice-and-scales/id6771943460)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cadenza Improv Prompts Weekly | $2.99 | per 7 days |
| Cadenza Improv Prompts Yearly | $14.99 | per year |
| Solo Practice Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is JamEngine free?

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

### Is Jazz Improv Practice & Scales free?

Jazz Improv Practice & Scales is free to download, with in-app purchases available.

### Do JamEngine or Jazz Improv Practice & Scales have ads?

Neither JamEngine nor Jazz Improv Practice & Scales shows ads.

### Which is updated more often, JamEngine or Jazz Improv Practice & Scales?

JamEngine ships an update every 5 days, and Jazz Improv Practice & Scales every 2 months. Most recently, JamEngine was updated on October 24, 2026 and Jazz Improv Practice & Scales on October 29, 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.*