# Audio / Spectrum Analyzer vs Spectrum AUv3 FFT Visualizer

The clearest difference is price: Audio / Spectrum Analyzer at Free against Spectrum AUv3 FFT Visualizer's $0.99. Audio / Spectrum Analyzer also leads on update cadence (every 2 weeks vs every 12 months). Spectrum AUv3 FFT Visualizer's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Audio / Spectrum Analyzer is free to download; Spectrum AUv3 FFT Visualizer costs $0.99 up front. Audio / Spectrum Analyzer sells 1 one-off in-app purchase. Spectrum AUv3 FFT Visualizer asks for nothing beyond the download.

Audio / Spectrum Analyzer ships an update every 2 weeks, Spectrum AUv3 FFT Visualizer every 12 months. The most recent releases landed on September 25, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Audio / Spectrum Analyzer | Spectrum AUv3 FFT Visualizer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.6 (1K ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer/id1508848574/reviews)** | — |
| Number of ratings | **1K** | — |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 12 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 10 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Loop-Sessions.LLC.](https://appshunter.io/developer/414215366) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### Audio / Spectrum Analyzer

[App page](https://appshunter.io/ios/app/audio-spectrum-analyzer/id1508848574)

This application analyzes audio input from your microphone, displaying both the waveform and amplitude spectrum in real-time. It offers extensive customization for display, calculation, and signal generation.

**Highlights:** Simultaneous waveform and spectrum display, Configurable display layouts, Selectable FFT size and averaging, Frequency weighting options (Flat, dBA, dBC), Octave band analysis, Audio signal and noise generation, Peak hold and pitch meter

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Remove ads, High-Res analysis) | $11.49 | one-time |

**What reviewers like**

- 👍 Customizable features
- ⚙️ Accurate measurements
- 🚀 Helpful for troubleshooting
- 💡 Useful for ghost hunting

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🔋 High battery and CPU usage
- 🚫 Inappropriate ads/content
- 🔒 Security concerns with payment info

**Reported bugs**

- Stuck on latest measurement
- White noise instead of expected functionality
- Disconnects AirPods

**Requested features**

- Sampling rate adjustment
- Wave shape tracking
- Audio file analysis
- Octave analysis


### 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 free?

Audio / Spectrum Analyzer 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 or Spectrum AUv3 FFT Visualizer have ads?

Audio / Spectrum Analyzer shows ads; Spectrum AUv3 FFT Visualizer does not.

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

Audio / Spectrum Analyzer ships an update every 2 weeks, and Spectrum AUv3 FFT Visualizer every 12 months. Most recently, Audio / Spectrum Analyzer was updated on September 25, 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.*