# JAX MASTERING vs Harmonicer

The clearest difference is update cadence: Harmonicer at every 4 days against JAX MASTERING's every 25 months. Harmonicer also leads on price ($4.99 vs $9.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

JAX MASTERING costs $9.99 and Harmonicer $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

JAX MASTERING ships an update every 25 months, Harmonicer every 4 days. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | JAX MASTERING | Harmonicer |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Rating | — | **[4.7 (12 ratings)](https://appshunter.io/ios/app/harmonicer/id6468485333/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 4 days** |
| Monetization | — | Paid |
| Size | 78 MB | 23 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Jens Guell](https://appshunter.io/developer/1195004865) | [Kai Aras](https://appshunter.io/developer/370820899) |

## What reviewers say

### JAX MASTERING

[App page](https://appshunter.io/ios/app/jax-mastering-mbc-pro/id1619272047)

**Features:** macOS Compatibility

**In-app purchases:** none


### Harmonicer

[App page](https://appshunter.io/ios/app/harmonicer/id6468485333)

This app generates musical inspiration by combining MIDI quantization, harmonization, and arpeggiation. It offers extensive scale support and allows for the creation of complex chords and rhythmic patterns to enhance musical compositions.

**Highlights:** MIDI Quantizer with 20+ scales, Custom scale support, Harmonizer with up to 4 voices, Arpeggiator with 10 modes, Process MIDI from any source, Standalone use with internal keyboard

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is JAX MASTERING free?

JAX MASTERING costs $9.99, with no in-app purchases.

### Is Harmonicer free?

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

### Do JAX MASTERING or Harmonicer have ads?

Neither JAX MASTERING nor Harmonicer shows ads.

### Which is updated more often, JAX MASTERING or Harmonicer?

JAX MASTERING ships an update every 25 months, and Harmonicer every 4 days. Most recently, JAX MASTERING was updated on October 12, 2026 and Harmonicer on October 25, 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.*