# Audio Spectrum Analyzer Pro vs Spectrum AUv3 FFT Visualizer

The clearest difference is price: Audio Spectrum Analyzer Pro at Free against Spectrum AUv3 FFT Visualizer's $0.99. Audio Spectrum Analyzer Pro also leads on iOS requirement (13.0 vs 15.0). Spectrum AUv3 FFT Visualizer's advantage is in-app purchases (none vs 2). On update cadence, ads and device support there is nothing between them.

Audio Spectrum Analyzer Pro is free to download; Spectrum AUv3 FFT Visualizer costs $0.99 up front. Audio Spectrum Analyzer Pro sells 2 in-app purchases, starting at $19.99 per year. Spectrum AUv3 FFT Visualizer asks for nothing beyond the download.

Audio Spectrum Analyzer Pro ships an update every 7 months, Spectrum AUv3 FFT Visualizer every 12 months. The most recent releases landed on September 24, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Audio Spectrum Analyzer Pro | Spectrum AUv3 FFT Visualizer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.4 (238 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806/reviews)** | — |
| Number of ratings | **238** | — |
| Positive reviews | 57.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 12 months |
| Monetization | Free with in-app purchases | — |
| Size | 40 MB | 10 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vlad Polyanskiy](https://appshunter.io/developer/438646985) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### Audio Spectrum Analyzer Pro

[App page](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806)

Analyze sound frequencies in real-time with this powerful tool. It offers detailed octave band analysis, FFT plots, and various measurement scales. Supports multiple microphones and noise analysis features for accurate audio insights.

**Highlights:** Octave Band Real Time Analyzer, FFT Plot (Fast Fourier Transform), Sound level meter (dB meter), Noise Rating and Noise Criterion support, Support for external microphones, Pre-calibrated mic profiles

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Mode | $19.99 | per year |
| Premium Pack | $29.99 | one-time |

**What reviewers like**

- 👍 Intuitive and easy-to-use interface
- 💰 Completely free with no ads
- 🎯 Accurate frequency and spectrum analysis
- 📊 Multiple visualization modes (FFT, spectrograph, bar display)
- 🔧 Professional-grade audio measurement tool

**What reviewers complain about**

- 💸 Aggressive subscription/paywall nags
- 🔄 Frequent iOS compatibility issues after updates
- 📉 Features moved behind paywall in recent updates
- 🐛 App crashes on startup (especially iOS 16/26)
- ⚠️ Misleading free trial that requires payment

**Reported bugs**

- App crashes on iOS 16 and iOS 26 launches
- FFT resolution not working after iOS updates
- Graph display freezes or becomes unresponsive
- Spectrograph mode too slow on newer iPhones
- Frequency alignment issues with dynamic display

**Requested features**

- Audio file upload capability
- White noise/test signal generator
- Microphone calibration file support
- Recording functionality with timestamp
- Multiple frequency cursors for comparison


### Spectrum AUv3 FFT Visualizer

[App page](https://appshunter.io/ios/app/spectrum-auv3-fft-visualizer/id6737164438)

**In-app purchases:** none


## Frequently asked questions

### Is Audio Spectrum Analyzer Pro free?

Audio Spectrum Analyzer Pro is free to download, with in-app purchases available.

### Is Spectrum AUv3 FFT Visualizer free?

Spectrum AUv3 FFT Visualizer costs $0.99, with no in-app purchases.

### Do Audio Spectrum Analyzer Pro or Spectrum AUv3 FFT Visualizer have ads?

Neither Audio Spectrum Analyzer Pro nor Spectrum AUv3 FFT Visualizer shows ads.

### Which is updated more often, Audio Spectrum Analyzer Pro or Spectrum AUv3 FFT Visualizer?

Audio Spectrum Analyzer Pro ships an update every 7 months, and Spectrum AUv3 FFT Visualizer every 12 months. Most recently, Audio Spectrum Analyzer Pro was updated on September 24, 2026 and Spectrum AUv3 FFT Visualizer on September 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*