# FFT vs Audio Spectrum Analyzer dB RTA

The clearest difference is price: Audio Spectrum Analyzer dB RTA at Free against FFT's $10.99. Audio Spectrum Analyzer dB RTA also leads on rating (4.5 vs 4.0) and ratings volume (3K vs 6). FFT's advantage is review sentiment (86% vs 44%). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Audio Spectrum Analyzer dB RTA is free to download; FFT costs $10.99 up front. FFT sells 1 one-off in-app purchase and Audio Spectrum Analyzer dB RTA sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Audio Spectrum Analyzer dB RTA holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer dB RTA has 3K 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 44% of Audio Spectrum Analyzer dB RTA's, so the app with the better star average is not the one people write more warmly about.

FFT ships an update every 4 months, Audio Spectrum Analyzer dB RTA every 5 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | FFT | Audio Spectrum Analyzer dB RTA |
| --- | --- | --- |
| Price | $10.99 | **Free** |
| Rating | [4.0 (6 ratings)](https://appshunter.io/ios/app/fft/id298840058/reviews) | **[4.5 (3K ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790/reviews)** |
| Number of ratings | 6 | **3K** |
| Positive reviews | **86.1% of reviews** | 43.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 31 MB | 24 MB |
| Requires iOS | 15.0 | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Marina Polyanskaya](https://appshunter.io/developer/1519482916) |

## 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 dB RTA

[App page](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790)

Analyze sound frequencies and decibel levels with this advanced tool. Ideal for tuning audio systems, it offers real-time spectrum analysis and sound metering for various applications.

**Highlights:** Octave Band Real-Time Analyzer, FFT Plot - Fast Fourier Transform, Integrated Sound Level Meter (dB-A), Multispectral Harmonic Analyzer, Hold Max and Min Peaks, Various Window Functions

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $1.99 | per month |
| Spectrum Analyzer Pro | $7.99 | one-time |

**What reviewers like**

- 🚀 Excellent audio analysis tool
- 👍 Clean and intuitive interface
- 💡 Customizable frequency range
- 🔍 Accurate real-time spectrum visualization

**What reviewers complain about**

- 🐛 Compatibility issues with newer iOS versions
- 🔁 Constant prompts to upgrade to Pro version
- 🔌 High battery consumption
- 📊 Inaccurate frequency tracking in some modes

**Reported bugs**

- Freezing and crashing on certain devices
- Incorrect frequency readings in Octave RTA mode
- Inability to switch between microphone sources

**Requested features**

- External microphone support
- Ability to save and compare measurement results
- More detailed instructions and tutorials
- Vertical orientation option


## Frequently asked questions

### Is FFT free?

FFT costs $10.99, and also offers in-app purchases.

### Is Audio Spectrum Analyzer dB RTA free?

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

### Which has better reviews, FFT or Audio Spectrum Analyzer dB RTA?

Audio Spectrum Analyzer dB RTA is rated higher. FFT averages 4.0 out of 5 from 6 ratings, while Audio Spectrum Analyzer dB RTA averages 4.5 from 3K ratings.

### Do FFT or Audio Spectrum Analyzer dB RTA have ads?

Neither FFT nor Audio Spectrum Analyzer dB RTA shows ads.

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

FFT ships an update every 4 months, and Audio Spectrum Analyzer dB RTA every 5 months. Most recently, FFT was updated on October 29, 2026 and Audio Spectrum Analyzer dB RTA on October 29, 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.*