# FFT vs Audio Spectrum Analyzer Pro

The clearest difference is price: Audio Spectrum Analyzer Pro at Free against FFT's $10.99. Audio Spectrum Analyzer Pro also leads on rating (4.4 vs 4.0) and ratings volume (238 vs 6). FFT's advantage is review sentiment (86% vs 57%). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Audio Spectrum Analyzer Pro is free to download; FFT costs $10.99 up front. FFT sells 1 one-off in-app purchase and Audio Spectrum Analyzer Pro sells 2 in-app purchases, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.

Audio Spectrum Analyzer Pro holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer Pro has 238 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 86% of FFT's written reviews are positive against 57% of Audio Spectrum Analyzer Pro's, so the app with the better star average is not the one people write more warmly about.

FFT ships an update every 6 months, Audio Spectrum Analyzer Pro every 7 months. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | FFT | Audio Spectrum Analyzer Pro |
| --- | --- | --- |
| Price | $10.99 | **Free** |
| Rating | [4.0 (6 ratings)](https://appshunter.io/ios/app/fft/id298840058/reviews) | **[4.4 (238 ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806/reviews)** |
| Number of ratings | 6 | **238** |
| Positive reviews | **86.1% of reviews** | 57.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 30 MB | 40 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Vlad Polyanskiy](https://appshunter.io/developer/438646985) |

## What reviewers say

### FFT

[App page](https://appshunter.io/ios/app/fft/id298840058)

Analyze audio with high-resolution frequency and amplitude graphs. Features include a signal generator, cursor readouts, and adjustable graph smoothing. Save and export your analysis results.

**Highlights:** High-resolution amplitude vs. frequency graph, Built-in low-distortion signal generator, Adjustable graph smoothing and decay time, Cursor readout for dB and frequency, Save and export analysis graphs and data, Peak tracking for highest frequency identification

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reference Curve Files | $9.99 | one-time |


### 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 free?

FFT costs $10.99, and also offers 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 or Audio Spectrum Analyzer Pro?

Audio Spectrum Analyzer Pro is rated higher. FFT averages 4.0 out of 5 from 6 ratings, while Audio Spectrum Analyzer Pro averages 4.4 from 238 ratings.

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

Neither FFT nor Audio Spectrum Analyzer Pro shows ads.

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

FFT ships an update every 6 months, and Audio Spectrum Analyzer Pro every 7 months. Most recently, FFT was updated on September 22, 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.*