# JamEngine vs Choral Lab

The clearest difference is price: JamEngine at Free against Choral Lab's $6.99. JamEngine also leads on update cadence (every 5 days vs every 6 weeks). Choral Lab's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

JamEngine is free to download; Choral Lab costs $6.99 up front. JamEngine sells 1 one-off in-app purchase. Choral Lab asks for nothing beyond the download.

JamEngine ships an update every 5 days, Choral Lab every 6 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | JamEngine | Choral Lab |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/choral-lab/id6782184585/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 6 weeks |
| Monetization | — | Paid |
| Size | 149 MB | 186 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Orcun Keskin](https://appshunter.io/developer/1681326325) | [Martin Adler](https://appshunter.io/developer/1896354791) |

## 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 |


### Choral Lab

[App page](https://appshunter.io/ios/app/choral-lab/id6782184585)

Compose and study Bach-style four-part chorales. Harmonize melodies with automatic voice generation, explore a library of 410 Bach chorales, and analyze chords in real-time. Offers both score and piano roll views for detailed study.

**Highlights:** Automatic SATB harmonization in Bach style, Library of 410 J.S. Bach chorales, Interactive soprano piano roll, Real-time chord analysis, Score and piano roll views, MIDI export

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

**In-app purchases:** none


## Frequently asked questions

### Is JamEngine free?

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

### Is Choral Lab free?

Choral Lab costs $6.99, with no in-app purchases.

### Do JamEngine or Choral Lab have ads?

Neither JamEngine nor Choral Lab shows ads.

### Which is updated more often, JamEngine or Choral Lab?

JamEngine ships an update every 5 days, and Choral Lab every 6 weeks. Most recently, JamEngine was updated on October 31, 2026 and Choral Lab on October 31, 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.*