# FFT Plot vs Audio / Spectrum Analyzer

The clearest difference is price: Audio / Spectrum Analyzer at Free against FFT Plot's $9.99. Audio / Spectrum Analyzer also leads on update cadence (every 2 weeks vs every 17 months) and ratings volume (1K vs 90). FFT Plot's advantage is in-app purchases (none vs 1) and ads (none vs shown). On review sentiment and device support there is nothing between them.

Audio / Spectrum Analyzer is free to download; FFT Plot costs $9.99 up front. Audio / Spectrum Analyzer sells 1 one-off in-app purchase. FFT Plot asks for nothing beyond the download.

FFT Plot holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Audio / Spectrum Analyzer has 1K ratings behind it against 90, so its average is the more settled of the two. Written reviews point the same way: 84% of FFT Plot's written reviews are positive against 79% of Audio / Spectrum Analyzer's.

FFT Plot ships an update every 17 months, Audio / Spectrum Analyzer every 2 weeks. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | FFT Plot | Audio / Spectrum Analyzer |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (90 ratings)](https://appshunter.io/ios/app/fft-plot/id569468015/reviews)** | [4.6 (1K ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer/id1508848574/reviews) |
| Number of ratings | 90 | **1K** |
| Positive reviews | **84.4% of reviews** | 78.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 5 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ONYX Apps](https://appshunter.io/developer/356553882) | [Loop-Sessions.LLC.](https://appshunter.io/developer/414215366) |

## What reviewers say

### FFT Plot

[App page](https://appshunter.io/ios/app/fft-plot/id569468015)

This real-time audio analysis app provides precision sound measurement and visualization. It's ideal for detecting sound issues, room tuning, and speaker calibration, offering detailed frequency analysis for musicians and audio professionals.

**Highlights:** Real-time audio analysis, Frequency detection, Averaging options, Window functions, Linear and logarithmic scales, Weighting options, Draggable cursors

**In-app purchases:** none


### 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


## Frequently asked questions

### Is FFT Plot free?

FFT Plot costs $9.99, with no in-app purchases.

### Is Audio / Spectrum Analyzer free?

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

### Which has better reviews, FFT Plot or Audio / Spectrum Analyzer?

FFT Plot is rated higher. FFT Plot averages 4.8 out of 5 from 90 ratings, while Audio / Spectrum Analyzer averages 4.6 from 1K ratings.

### Do FFT Plot or Audio / Spectrum Analyzer have ads?

Audio / Spectrum Analyzer shows ads; FFT Plot does not.

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

FFT Plot ships an update every 17 months, and Audio / Spectrum Analyzer every 2 weeks. Most recently, FFT Plot was updated on September 23, 2026 and Audio / Spectrum Analyzer on September 25, 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.*