# Low Frequency Detector vs Sound Spectrum Analysis

The clearest difference is price: Sound Spectrum Analysis at Free against Low Frequency Detector's $9.99. Sound Spectrum Analysis also leads on rating (3.6 vs 2.8) and update cadence (every 5 weeks vs every 9 months). Low Frequency Detector's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Sound Spectrum Analysis is free to download; Low Frequency Detector costs $9.99 up front. Sound Spectrum Analysis sells 1 one-off in-app purchase. Low Frequency Detector asks for nothing beyond the download.

Sound Spectrum Analysis holds the better App Store score, 3.6 against 2.8. That said, the two scores are not equally well evidenced: Sound Spectrum Analysis has 42 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 50% of Low Frequency Detector's written reviews are positive against 58% of Sound Spectrum Analysis's.

Low Frequency Detector ships an update every 9 months, Sound Spectrum Analysis every 5 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Low Frequency Detector | Sound Spectrum Analysis |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [2.8 (6 ratings)](https://appshunter.io/ios/app/low-frequency-detector/id1196584147/reviews) | **[3.6 (42 ratings)](https://appshunter.io/ios/app/sound-spectrum-analysis/id1434975523/reviews)** |
| Number of ratings | 6 | **42** |
| Positive reviews | 50.0% of reviews | **58.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 5 MB |
| Requires iOS | 26.2 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) |

## What reviewers say

### Low Frequency Detector

[App page](https://appshunter.io/ios/app/low-frequency-detector/id1196584147)

This tool measures and analyzes low-frequency sounds that are difficult for the human ear to detect. It helps identify potential noise pollution from sources like construction or factories, providing detailed reports on frequency components and sound levels.

**Highlights:** Low-frequency power level measurement (<100Hz), Audible band power level measurement (Leq), 1/3 octave band analysis (OCT), FFT analysis (FFT), Time course graph (TIME), Measurement report generation, Calibration function

**In-app purchases:** none


### Sound Spectrum Analysis

[App page](https://appshunter.io/ios/app/sound-spectrum-analysis/id1434975523)

Analyze sound spectrums in real-time using your device's microphone. This tool offers detailed frequency and amplitude scales, various window functions, and octave band analysis. It can also function as a noise level meter and allows for data export and saving of measurements.

**Highlights:** Real-time sound spectrum analysis, Fast Fourier Transform (FFT) with adjustable size, Linear and logarithmic frequency/amplitude scales, Octave band analysis (1/1, 1/3, 1/6, 1/12), Multiple window functions, A- and C-Weightings, Sound level meter (dB SPL)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $2.99 | one-time |


## Frequently asked questions

### Is Low Frequency Detector free?

Low Frequency Detector costs $9.99, with no in-app purchases.

### Is Sound Spectrum Analysis free?

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

### Which has better reviews, Low Frequency Detector or Sound Spectrum Analysis?

Sound Spectrum Analysis is rated higher. Low Frequency Detector averages 2.8 out of 5 from 6 ratings, while Sound Spectrum Analysis averages 3.6 from 42 ratings.

### Do Low Frequency Detector or Sound Spectrum Analysis have ads?

Neither Low Frequency Detector nor Sound Spectrum Analysis shows ads.

### Which is updated more often, Low Frequency Detector or Sound Spectrum Analysis?

Low Frequency Detector ships an update every 9 months, and Sound Spectrum Analysis every 5 weeks. Most recently, Low Frequency Detector was updated on November 2, 2026 and Sound Spectrum Analysis on November 4, 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.*