# FFT Plot vs Audio Spectrum Analyzer dB RTA

The clearest difference is price: Audio Spectrum Analyzer dB RTA at Free against FFT Plot's $9.99. Audio Spectrum Analyzer dB RTA also leads on ratings volume (3K vs 90) and update cadence (every 5 months vs every 17 months). FFT Plot's advantage is review sentiment (84% vs 44%) and in-app purchases (none vs 2). On ads and device support there is nothing between them.

Audio Spectrum Analyzer dB RTA is free to download; FFT Plot costs $9.99 up front. Audio Spectrum Analyzer dB RTA sells 2 in-app purchases, starting at $1.99 per month. FFT Plot asks for nothing beyond the download.

FFT Plot holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer dB RTA has 3K 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 44% of Audio Spectrum Analyzer dB RTA's.

FFT Plot ships an update every 17 months, Audio Spectrum Analyzer dB RTA every 5 months. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | FFT Plot | Audio Spectrum Analyzer dB RTA |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (90 ratings)](https://appshunter.io/ios/app/fft-plot/id569468015/reviews)** | [4.5 (3K ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790/reviews) |
| Number of ratings | 90 | **3K** |
| Positive reviews | **84.4% of reviews** | 43.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 5 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 24 MB |
| Requires iOS | **11.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ONYX Apps](https://appshunter.io/developer/356553882) | [Marina Polyanskaya](https://appshunter.io/developer/1519482916) |

## 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 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 Plot free?

FFT Plot costs $9.99, with no 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 Plot or Audio Spectrum Analyzer dB RTA?

FFT Plot is rated higher. FFT Plot averages 4.8 out of 5 from 90 ratings, while Audio Spectrum Analyzer dB RTA averages 4.5 from 3K ratings.

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

Neither FFT Plot nor Audio Spectrum Analyzer dB RTA shows ads.

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

FFT Plot ships an update every 17 months, and Audio Spectrum Analyzer dB RTA every 5 months. Most recently, FFT Plot was updated on September 23, 2026 and Audio Spectrum Analyzer dB RTA on September 22, 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.*