JAX SR vs Harmonicer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JAX SR
This audio effect processor allows selective frequency range processing for modulation effects. It offers a classic chorus with MIDI control and aims to avoid negative side effects by targeting specific frequency bands.
- Selective frequency range processing
- Classic chorus modulation
- Optional direct MIDI control
- Universal app for multiple Apple platforms
- Avoids negative side effects of full-range effects
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The manual is available at : https://audio.digitster.com/wp-content/uploads/2024/05/JAX-SR-Chorus-Manual.pdf The JAX SR Series are AudioUnits (AUv3), which allow to select a frequency range for effect processing. This one provides a classic chorus modulation effect with optional direct MIDI control assignment to the parameters. If (especially) modulation effects are applied to the entire frequency range, this usually will introduce negative side effects. The JAX [SR] Series allow a selective frequency range and dynamic adjustment of the mix easily. More information can be found on the product website at: https://audio.digitster.com/ Please note, that AudioUnits (AUv3) require a supporting host application to perform. This build (like all our latest releases) is truly 'universal', meaning, the audio unit is available for: - MacOS (Apple Silicon) - iOS (all actual iPhones) - iPadOS (all actual iPads) - visionOS (Apple Vision Pro) Requirements: MacOS 10.15++ iOS 14.0++
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 review sentiment: Harmonicer at 80% against JAX SR's 0%. Harmonicer also leads on update cadence (every 4 days vs monthly) and ratings volume (12 vs 1). JAX SR's advantage is rating (5.0 vs 4.7). On ads, in-app purchases, monetization model and device support 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 SR costs $6.99 and Harmonicer $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
JAX SR holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Harmonicer has 12 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 0% of JAX SR's written reviews are positive against 80% of Harmonicer's, so the app with the better star average is not the one people write more warmly about.
JAX SR ships an update monthly, Harmonicer every 4 days. The most recent releases landed on September 23, 2026 and October 25, 2026 respectively.
| Parameter | JAX SR | Harmonicer |
|---|---|---|
| Price | $6.99 | $4.99 — better |
| Rating | 5.0 (1 ratings) — better | 4.7 (12 ratings) |
| Positive reviews | 0.0% of reviews | 80.0% of reviews — better |
| Number of ratings | 1 | 12 — better |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 14.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Jens Guell | Kai Aras |
Customer experience
JAX SR
Harmonicer
In-app purchases
JAX SR
No in-app purchases
Harmonicer
No in-app purchases









