# FFT Plot vs Spectrum Analyzer

The clearest difference is review sentiment: FFT Plot at 84% against Spectrum Analyzer's 5%. FFT Plot also leads on rating (4.8 vs 4.2) and in-app purchases (none vs 13). Spectrum Analyzer's advantage is price (Free vs $9.99) and update cadence (fortnightly vs every 17 months). On ratings volume and device support there is nothing between them.

Spectrum Analyzer is free to download; FFT Plot costs $9.99 up front. Spectrum Analyzer sells 13 in-app purchases, starting at $4.99 per 7 days. FFT Plot asks for nothing beyond the download.

FFT Plot holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 90 and 197 respectively. Written reviews point the same way: 84% of FFT Plot's written reviews are positive against 5% of Spectrum Analyzer's.

FFT Plot ships an update every 17 months, Spectrum Analyzer fortnightly. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | FFT Plot | Spectrum Analyzer |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (90 ratings)](https://appshunter.io/ios/app/fft-plot/id569468015/reviews)** | [4.2 (197 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895/reviews) |
| Number of ratings | 90 | **197** |
| Positive reviews | **84.4% of reviews** | 5.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Fortnightly** |
| Monetization | **Free** | Freemium |
| Size | 7 MB | 132 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ONYX Apps](https://appshunter.io/developer/356553882) | [Music Breath](https://appshunter.io/developer/1140008995) |

## 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


### Spectrum Analyzer

[App page](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895)

Visualize audio frequencies with real-time analysis. Features include a sound level meter, multichannel harmonic analysis, and adjustable graphical representations. Gain insights into your sound environment with advanced tools.

**Highlights:** Sound level meter, Multichannel harmonic analysis, Adjustable graphics, AI-powered sound source analyzer, Real-time analysis, FFT analysis

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pitch Finder: Audio Visualizer | $4.99 | per 7 days |
| Pitch Finder: Audio Visualizer | $9.99 | per month |
| One Month Sale | $9.99 | per month |
| 1 Week Subscription | $9.99 | per 7 days |
| 1 Year Sub. with discount | $19.99 | per year |
| 1 Month Subscription | $19.99 | per month |
| 3 Month Subscription | $25.99 | per 3 months |
| 1 Year Subscription | $39.99 | per year |
| 2 months subscription | $39.99 | per 2 months |
| No Ads | $9.99 | one-time |
| Additional Settings Controls | $15.99 | one-time |
| Full Pack + No Ads | $19.99 | one-time |
| Get More | $19.99 | one-time |

**What reviewers like**

- ✅ Accurate frequency identification
- ✅ Clear and easy-to-read display
- ✅ Useful noise floor setup feature
- ✅ Works well when ads are removed

**What reviewers complain about**

- 💰 Extremely aggressive monetization strategy
- 📢 Excessive and intrusive ads
- 🔊 Loud ads that ignore device mute settings
- 🚫 Requires subscription/payment to access core features
- 😤 Deceptive purchase practices and accidental charges

**Reported bugs**

- App becomes unusable after iOS 16 update
- Crashes immediately on iPhone 5 with iOS 7
- Cannot exit app on iPhone X without reboot
- App freezes when changing settings or views
- Inaccurate frequency readings

**Requested features**

- Audio file import functionality
- Customizable background colors for chroma key compatibility
- Ability to record audio instead of only analyzing
- Better documentation and help files
- Improved sensitivity for detecting soft sounds


## Frequently asked questions

### Is FFT Plot free?

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

### Is Spectrum Analyzer free?

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

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

FFT Plot is rated higher. FFT Plot averages 4.8 out of 5 from 90 ratings, while Spectrum Analyzer averages 4.2 from 197 ratings.

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

Spectrum Analyzer shows ads; FFT Plot does not.

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

FFT Plot ships an update every 17 months, and Spectrum Analyzer fortnightly. Most recently, FFT Plot was updated on September 23, 2026 and Spectrum Analyzer on September 26, 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.*