Spectrum AUv3 FFT Visualizer vs pOus
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.
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.
- BassDrum emulation
- Adjustable tune and decay
- MIDI OUT envelope follower
- Scale mode for musical notes
- AUv3 instrument
- MIDI CC routing
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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
Verdict
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
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.
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.
| Parameter | Spectrum AUv3 FFT Visualizer | pOus |
|---|---|---|
| Price | $0.99 — better | $2.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 12 months | Every 4 months — 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 | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | DiscoDSP LLC | Satoshi Kajii |
In-app purchases
Spectrum AUv3 FFT Visualizer
No in-app purchases
pOus
No in-app purchases
Questions
Is Spectrum AUv3 FFT Visualizer free?
Is pOus free?
Do Spectrum AUv3 FFT Visualizer or pOus have ads?
Which is updated more often, Spectrum AUv3 FFT Visualizer or pOus?
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