# FFT Plot vs Audio Spectrum Analyzer Pro

The clearest difference is price: Audio Spectrum Analyzer Pro at Free against FFT Plot's $9.99. Audio Spectrum Analyzer Pro also leads on update cadence (every 7 months vs every 17 months). FFT Plot's advantage is in-app purchases (none vs 2) and rating (4.8 vs 4.4). On ratings volume, ads and device support there is nothing between them.

Audio Spectrum Analyzer Pro is free to download; FFT Plot costs $9.99 up front. Audio Spectrum Analyzer Pro sells 2 in-app purchases, starting at $19.99 per year. FFT Plot asks for nothing beyond the download.

FFT Plot holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 90 and 238 respectively. Written reviews point the same way: 84% of FFT Plot's written reviews are positive against 57% of Audio Spectrum Analyzer Pro's.

FFT Plot ships an update every 17 months, Audio Spectrum Analyzer Pro every 7 months. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | FFT Plot | Audio Spectrum Analyzer Pro |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (90 ratings)](https://appshunter.io/ios/app/fft-plot/id569468015/reviews)** | [4.4 (238 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806/reviews) |
| Number of ratings | 90 | **238** |
| Positive reviews | **84.4% of reviews** | 57.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 7 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 40 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ONYX Apps](https://appshunter.io/developer/356553882) | [Vlad Polyanskiy](https://appshunter.io/developer/438646985) |

## 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 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


## Frequently asked questions

### Is FFT Plot free?

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

### Is Audio Spectrum Analyzer Pro free?

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

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

FFT Plot is rated higher. FFT Plot averages 4.8 out of 5 from 90 ratings, while Audio Spectrum Analyzer Pro averages 4.4 from 238 ratings.

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

Neither FFT Plot nor Audio Spectrum Analyzer Pro shows ads.

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

FFT Plot ships an update every 17 months, and Audio Spectrum Analyzer Pro every 7 months. Most recently, FFT Plot was updated on September 23, 2026 and Audio Spectrum Analyzer Pro on September 24, 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.*