Spectrum AUv3 FFT Visualizer vs Jacquardi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spectrum AUv3 FFT Visualizer
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Turn sound into stunning visuals with Spectrum, an AUv3-compatible real-time spectrum analyzer for audio signals. Effortlessly monitor 29 specific frequencies from 10 Hz to 20 kHz with precision, powered by Fast Fourier Transform (FFT) data. Spectrum’s sleek graphics feature vertical markers, filled paths, and a smooth gradient background for an immersive visual experience. Enjoy accurate frequency placement with logarithmic scaling, and interact seamlessly using touch to highlight specific frequencies. Designed for performance, it dynamically adjusts to real-time data, transforms decibels, and ensures smooth, optimized rendering for flawless updates.
Jacquardi
This app generates analog-like envelope signals via MIDI CC, allowing users to modulate parameters of other compatible music plugins. It acts as a MIDI module for creative sound shaping without producing its own audio.
- Generates analog-like envelope signals
- Sends MIDI CC for parameter modulation
- Works with 3rd-party AUv3 plugins
- Requires MIDI routing host (AUM, apeMatrix)
- Modulates filter cutoff and other parameters
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Concept: "Jacquardi" is an AUv3 instrument that does not make any sounds but just sends out analog-like Envelope signal via MIDI Control Change (MIDI CC). That is, the app is a MIDI module of envelope generator. The user can use it for modulating any parameter of 3rd-party’s plugin that can be assigned to MIDI CC , for example, filter cutoff. Usage: Just assign MIDI keyboard to Jacquardi's MIDI IN (it needs to trigger Jacquardi) and assign Jacquardi's MIDI OUT to 3rd party's plugin. System Requirements: Auv3 host that has a flexible capability of MIDI routing (AUM, apeMatrix etc).
Screenshots
Verdict
The clearest difference is update cadence: Jacquardi at weekly against Spectrum AUv3 FFT Visualizer's every 12 months. Jacquardi also leads on iOS requirement (12.0 vs 15.0). Spectrum AUv3 FFT Visualizer's advantage is price ($0.99 vs $1.99). On 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
Spectrum AUv3 FFT Visualizer costs $0.99 and Jacquardi $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Spectrum AUv3 FFT Visualizer ships an update every 12 months, Jacquardi weekly. The most recent releases landed on October 27, 2026 and October 18, 2026 respectively.
| Parameter | Spectrum AUv3 FFT Visualizer | Jacquardi |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 12 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | DiscoDSP LLC | Satoshi Kajii |
In-app purchases
Spectrum AUv3 FFT Visualizer
No in-app purchases
Jacquardi
No in-app purchases
Questions
Is Spectrum AUv3 FFT Visualizer free?
Is Jacquardi free?
Do Spectrum AUv3 FFT Visualizer or Jacquardi have ads?
Which is updated more often, Spectrum AUv3 FFT Visualizer or Jacquardi?
Other comparisons
