ab EQ X vs Jacquardi4
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ab EQ X
This application offers a parametric equalizer that operates with Ambisonics technology. It allows independent equalization of three dimensional poles (LEFT, RIGHT, FRONT) with five bands each, supporting various filter types and a DRY/WET mix control.
- Ambisonics-based equalization
- 3 independent dimensional poles (LEFT, RIGHT, FRONT)
- 5 bands per pole
- Multiple filter types (HP, LP, Shelf, Bell, Notch)
- DRY/WET MIX control
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An Equaliser that works in Ambisonics under the hood. Three different dimensional poles can be equalised independently (LEFT, RIGHT, FRONT) with unique results! - 5 Bands per dimensional poles. - Each band can be High Pass, Low Pass, High Shelf, Low Shelf, Notch, or Bell. - DRY/WET MIX control
Jacquardi4
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Concept: “Jacquardi4” is an AUv3 instrument that does not make any sounds but can send out 4 analog-like “Envelope” signals via MIDI control changes (MIDI CC). That is, the app contains 4 MIDI modules of envelope generator. The user can use them for modulating any parameter of 3rd-party’s plugins that can be assigned to MIDI CC , for example, cutoff frequency. System Requirements: AUv3 host that has a flexible capability of MIDI routing (AUM, apeMatrix, LoopyPro, etc). Usage: Just assign MIDI keyboard to Jacquardi4's MIDI IN (it needs to trigger Jacquardi4) and assign Jacquardi4's MIDI OUT to 3rd party's plugins. Explanation of sliders: Channel: determines MIDI channel. Control Rate: determines the resolution of MIDI processing. Higher value, higher resolution. Active: turn on or off the module. Useful when using MIDI learn functionality of 3rd party plugin. MIDI CC: determines MIDI control number. (text-editable) Amp: determines amplitude in dB Offset: determines an initial value. Attack: attack value. Decay Time: decay time value. Decay Curve: decay curve value. Sustain: sustain value. Release: release value. Explanation of Preset File System: At first make a new bank folder, in which you can save a preset file. And push "Save As" button. Also the user can export or import preset files.
Screenshots
Verdict
The clearest difference is update cadence: Jacquardi4 at weekly against ab EQ X's every 6 months. On price, ads, in-app purchases 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
ab EQ X costs $5.99 and Jacquardi4 $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ab EQ X ships an update every 6 months, Jacquardi4 weekly. Both last shipped on October 31, 2026.
| Parameter | ab EQ X | Jacquardi4 |
|---|---|---|
| Price | $5.99 | $5.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 6 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15 | 15.0 |
| Further details — not scored | ||
| Size | 12 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Alejandro Cabrera Zuniga | Satoshi Kajii |
In-app purchases
ab EQ X
No in-app purchases
Jacquardi4
No in-app purchases









