Comparison

Spectrum AUv3 FFT Visualizer vs pOus

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

Head to head
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.

About

pOus

This app emulates analog drum machine bass drums with adjustable tuning and decay. It offers MIDI OUT functionality for envelope follower data and a scale mode for playing musical scales. Designed for musicians using AUv3 hosts.

Highlights
  • BassDrum emulation
  • Adjustable tune and decay
  • MIDI OUT envelope follower
  • Scale mode for musical notes
  • AUv3 instrument
  • MIDI CC routing
Read full description

Concept: The app is an AUv3 instrument that emulates the so-called “BassDrum” of analog drum machine. In addition it features MIDI OUT functionality of Envelop Follower, that is, the user can send out this instrument's unique envelop via midi CC for modulating external plugins. Also there is "scale mode" where the user can play "pOus" with musical scale like Bass. System Requirements: AUv3 host that has a flexible capability of MIDI routing (AUM, apeMatrix, etc) Usage: There are 9 sliders & one button. Tune: BassDrum’s fundamental frequency (30hz - 160hz). text-editable. Decay: determines its duration. Amp: audio’s decibel representation. MIDI OUT: whether the functionality of envelop follower is turned on or off (default: off) MIDI Gain: gain amount of MIDI out Offset: balances the output parameter’s value Channel: determines MIDI channel MIDI CC: determines the destination MIDI CC number. text-editable Scale Mode: This is a sort of Bass mode, that is, it can play musical scale in response to incoming MIDI notes. Button: triggers the instrument. Recommended Scheme: drum machine (MIDI out) -> “pOus” -> audio effect (compressor, saturator etc)

Screenshots

Spectrum AUv3 FFT Visualizer2 screens
pOus2 screens

Verdict

The call

The clearest difference is update cadence: pOus at every 4 months against Spectrum AUv3 FFT Visualizer's every 12 months. pOus also leads on iOS requirement (12.0 vs 15.0). Spectrum AUv3 FFT Visualizer's advantage is price ($0.99 vs $2.99). 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

CostPrice · In-app purchases · Ads · Monetization

Spectrum AUv3 FFT Visualizer costs $0.99 and pOus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Spectrum AUv3 FFT Visualizer ships an update every 12 months, pOus every 4 months. The most recent releases landed on October 18, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 6 level
Spectrum AUv3 FFT Visualizer versus pOus: the parameters behind the verdict, then further details
ParameterSpectrum AUv3 FFT VisualizerpOus
Price$0.99 — better$2.99
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 12 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size10 MB15 MB
Age rating4+4+
DeveloperDiscoDSP LLCSatoshi Kajii

In-app purchases

None

Spectrum AUv3 FFT Visualizer

No in-app purchases

None

pOus

No in-app purchases

Questions

Is Spectrum AUv3 FFT Visualizer free?
Spectrum AUv3 FFT Visualizer costs $0.99, with no in-app purchases.
Is pOus free?
pOus costs $2.99, with no in-app purchases.
Do Spectrum AUv3 FFT Visualizer or pOus have ads?
Neither Spectrum AUv3 FFT Visualizer nor pOus shows ads.
Which is updated more often, Spectrum AUv3 FFT Visualizer or pOus?
Spectrum AUv3 FFT Visualizer ships an update every 12 months, and pOus every 4 months. Most recently, Spectrum AUv3 FFT Visualizer was updated on October 18, 2026 and pOus on October 8, 2026.

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