# SmarterNoise Pro vs Spectrum Analyzer+ Audio FFT

The clearest difference is rating: SmarterNoise Pro at 4.4 against Spectrum Analyzer+ Audio FFT's 2.3. SmarterNoise Pro also leads on ads (none vs shown) and ratings volume (31 vs 3). Spectrum Analyzer+ Audio FFT's advantage is in-app purchases (none vs 4) and update cadence (weekly vs monthly). On price and device support there is nothing between them.

Both are free to download. SmarterNoise Pro sells 4 one-off in-app purchases. Spectrum Analyzer+ Audio FFT asks for nothing beyond the download.

SmarterNoise Pro holds the better App Store score, 4.4 against 2.3. That said, the two scores are not equally well evidenced: SmarterNoise Pro has 31 ratings behind it against 3, so its average is the more settled of the two.

SmarterNoise Pro ships an update monthly, Spectrum Analyzer+ Audio FFT weekly. The most recent releases landed on September 22, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | SmarterNoise Pro | Spectrum Analyzer+ Audio FFT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (31 ratings)](https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-plus-audio-fft/id6760830858/reviews) |
| Number of ratings | **31** | 3 |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 24 MB | 69 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [Johan Rogard](https://appshunter.io/developer/1384299041) | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) |

## What reviewers say

### SmarterNoise Pro

[App page](https://appshunter.io/ios/app/smarternoise-pro/id1466745030)

This advanced sound level meter app offers detailed audio analysis with features like frequency spectrum display and data export. It allows for precise sound measurements in both video and audio recording modes, with options for A-, C-, or no weighting.

**Highlights:** Sound level measurement in video/audio modes, Frequency spectrum display, Export measurement data (CSV), Sound level activated audio recording, Calibration tool, Full HD video recording (paid)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Camera upgrade | $0.99 | one-time |
| Frequency spectrum indicator | $1.99 | one-time |
| Video and audio recording | $1.99 | one-time |
| Spectrogram display | $1.99 | one-time |


### Spectrum Analyzer+ Audio FFT

[App page](https://appshunter.io/ios/app/spectrum-analyzer-plus-audio-fft/id6760830858)

This utility transforms your device into a real-time audio frequency analyzer. It visualizes sound frequencies from 20 Hz to 20 kHz using the microphone, displaying amplitude and peak frequencies. It's designed for musicians, audio engineers, and sound enthusiasts.

**Highlights:** Real-time FFT audio spectrum visualization, Frequency range 20 Hz to 20 kHz, Peak frequency detection, Average dB level per band, Adjustable dB range, Dark theme

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

**In-app purchases:** none


## Frequently asked questions

### Is SmarterNoise Pro free?

SmarterNoise Pro is free to download, with in-app purchases available.

### Is Spectrum Analyzer+ Audio FFT free?

Spectrum Analyzer+ Audio FFT is free to download, with no in-app purchases.

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

SmarterNoise Pro is rated higher. SmarterNoise Pro averages 4.4 out of 5 from 31 ratings, while Spectrum Analyzer+ Audio FFT averages 2.3 from 3 ratings.

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

Spectrum Analyzer+ Audio FFT shows ads; SmarterNoise Pro does not.

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

SmarterNoise Pro ships an update monthly, and Spectrum Analyzer+ Audio FFT weekly. Most recently, SmarterNoise Pro was updated on September 22, 2026 and Spectrum Analyzer+ Audio FFT on October 3, 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.*