JAX MASTERING vs Harmonicer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JAX MASTERING
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Please note, that AudioUnits (AUv3) require a supporting host application to perform. The MBC Pro is a multi band / master bus audio processor (companders), suitable for mastering. Parallel analog modeled filters split the audio stream into 5 freely adjustable bands, on which the 5 dynamic processors will perform action in parallel - each wit its own set of parameters - or linked together. Input and output is stereo, parallel processing for each frequency band (mix with the original) is possible. The effect processors now have zero latency. A PDF manual is included with the app : https://audio.digitster.com/wp-content/uploads/2024/04/JAX-MASTERING-MBC-Pro.pdf This app is truly 'universal', meaning, unit is available for: - MacOS (Silicon) - iOS (iPhone) - iPadOS (iPads) - visionOS (Apple Vision Pro)
Harmonicer
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.
- 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
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Instant Inspiration at Your Fingertips Harmonicer combines MIDI Quantizer, Harmonizer and Arpeggiator into one convenient package. At the core of Harmonicer lies its Quantizer feature with over 20 pre defined scales and support for custom scales. Whether you're a seasoned composer or a novice musician, Harmonicer empowers you to effortlessly create melodies that are harmonically rich and sonically captivating. Unlock Limitless Harmonic Possibilities Harmonicer's Harmonizer functionality takes your compositions to new heights by automatically generating lush chords and harmonies. With up to 4 additional voices and intuitive controls, you can explore a vast array of harmonic possibilities and infuse your music with depth and emotion. Unleash Your Creativity with Dynamic Arpeggiation With Harmonicer's Arpeggiator, intricate rhythmic patterns and melodic sequences are just a few taps away. Whether you're crafting pulsating basslines, mesmerizing synth leads, or intricate melodies, the Arpeggiator empowers you to infuse your tracks with movement and energy, adding a dynamic edge to your music. Combining Power and Versatility What sets Harmonicer apart is its seamless integration of these three powerful tools, allowing users to utilize them individually or in combination to achieve complex compositions with ease. Whether you're looking to fine-tune a melody, enrich your harmonies, or add rhythmic complexity, Harmonicer provides the tools you need to inspire your musical vision and bring it to life. Specs: - Quantizer with support for 20+ pre defined as well as custom scales - Harmonizer with up to 4 additional voices - Arpeggiator with 10 modes, note repeates, ratchets and more - Process MIDI from any source - Standalone use via internal keyboard Supports: - Standalone - AUv3
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | JAX MASTERING | Harmonicer |
|---|---|---|
| Price | $9.99 | $4.99 — better |
| Rating | — | 4.7 (12 ratings) — better |
| Positive reviews | — | 80.0% of reviews |
| Number of ratings | — | 12 — better |
| Update frequency | Every 25 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 78 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Jens Guell | Kai Aras |
In-app purchases
JAX MASTERING
No in-app purchases
Harmonicer
No in-app purchases






