Comparison

Chorus D vs Spectrum AUv3 FFT Visualizer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Chorus D

This audio unit effect emulates a classic chorus stomp-box with a unique, subtle sound. It offers a wider stereo image and thicker sound without the typical pitch-wavy artifacts. Its simplified interface provides a range of tasteful tones.

Highlights
  • Subtle stereo pitch-shifting
  • Constant pitch-shift amounts
  • Stereo image widening
  • Sound thickening
  • Six tasteful presets
  • Unique sound profile
Features
Read full description

Chorus D is an audio unit effect inspired by a well-loved classic chorus stomp-box. HOW IS IT DIFFERENT FROM OTHER CHORUS EFFECTS? It's more subtle. It has a stereo pair of pitch-shifters, one shifts up and the other down. Every few seconds, the two pitch shifters trade places: the high one goes low and the low one goes high. Unlike most other chorus effects, the pitch-shift amounts stay constant rather than oscillating up and down. For that reason, you don't hear the wavy pitch sound that other chorus effects make. At low settings, you can put it on a track to widen the stereo image or thicken up the sound and listeners may not be able to identify that they are hearing a chorus effect. WHY ONLY SIX BUTTONS? The original hardware that inspired this design had only four buttons and four presets, one for each button.* The simplicity of the controls is one of the reasons the effect was so well-liked: all four presets sounded great. With six buttons you get tones ranging from very subtle to clearly audible, and all of them are tasteful and useful. This effect makes only one type of sound but it's a unique sound that you don't get from other chorus effects. IS THIS AN EXACT CIRCUIT MODEL OF THE ORIGINAL HARDWARE EFFECT? No. We listened to the original and studied its design but then we built an effect to please our own ears. It sounds similar to the original but the design is unique. ************************************ Note: this is an audio unit plugin. It does not process audio as a standalone app. *Later on customers figured out that they could get some other settings by pressing two buttons simultaneously or forcing all the buttons off. We are using six buttons to get wider variety of sounds rather than expecting customers to discover those secret features of the original hardware.

About

Spectrum AUv3 FFT Visualizer

Features
Read full description

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.

Screenshots

Chorus D4 screens
Spectrum AUv3 FFT Visualizer2 screens

Verdict

The call

The clearest difference is price: Spectrum AUv3 FFT Visualizer at $0.99 against Chorus D's $5.99. Chorus D's advantage is iOS requirement (12.0 vs 15.0). On update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Chorus D costs $5.99 and Spectrum AUv3 FFT Visualizer $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Chorus D ships an update every 7 months, Spectrum AUv3 FFT Visualizer every 12 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
Chorus D versus Spectrum AUv3 FFT Visualizer: the parameters behind the verdict, then further details
ParameterChorus DSpectrum AUv3 FFT Visualizer
Price$5.99$0.99 — better
Rating5.0 (6 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings6 — better—
Update frequencyEvery 7 months — betterEvery 12 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size11 MB10 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company LimitedDiscoDSP LLC

In-app purchases

None

Chorus D

No in-app purchases

None

Spectrum AUv3 FFT Visualizer

No in-app purchases

Questions

Is Chorus D free?
Chorus D costs $5.99, with no in-app purchases.
Is Spectrum AUv3 FFT Visualizer free?
Spectrum AUv3 FFT Visualizer costs $0.99, with no in-app purchases.
Do Chorus D or Spectrum AUv3 FFT Visualizer have ads?
Neither Chorus D nor Spectrum AUv3 FFT Visualizer shows ads.
Which is updated more often, Chorus D or Spectrum AUv3 FFT Visualizer?
Chorus D ships an update every 7 months, and Spectrum AUv3 FFT Visualizer every 12 months. Most recently, Chorus D was updated on November 3, 2026 and Spectrum AUv3 FFT Visualizer on October 30, 2026.

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