# Low Frequency Detector vs Decibel Meter

The clearest difference is price: Decibel Meter at Free against Low Frequency Detector's $9.99. Decibel Meter also leads on rating (3.5 vs 2.8) and ratings volume (55 vs 6). Low Frequency Detector's advantage is in-app purchases (none vs 4). On review sentiment, update cadence, ads and device support there is nothing between them.

Decibel Meter is free to download; Low Frequency Detector costs $9.99 up front. Decibel Meter sells 4 in-app purchases, starting at $3.99 per 7 days. Low Frequency Detector asks for nothing beyond the download.

Decibel Meter holds the better App Store score, 3.5 against 2.8. That said, the two scores are not equally well evidenced: Decibel Meter has 55 ratings behind it against 6, so its average is the more settled of the two. Written reviews split almost evenly too, at 50% and 50% positive.

Low Frequency Detector ships an update every 9 months, Decibel Meter every 11 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Low Frequency Detector | Decibel Meter |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [2.8 (6 ratings)](https://appshunter.io/ios/app/low-frequency-detector/id1196584147/reviews) | **[3.5 (55 ratings)](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id1579747105/reviews)** |
| Number of ratings | 6 | **55** |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 11 months |
| Monetization | Paid | **Freemium** |
| Size | 1 MB | 18 MB |
| Requires iOS | 26.2 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [Rychard Matskevich](https://appshunter.io/developer/1395390712) |

## 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


### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id1579747105)

This tool transforms your iPhone into a professional sound level meter, measuring decibels and analyzing sound frequencies. It helps identify harmful noise levels to protect your hearing and health, offering detailed insights and measurement history.

**Highlights:** Professional sound level meter, Sound frequency analysis, Noise dosimeter with standards, Accurate sound pressure measurements, Save and export measurements, Advanced measurement charts, MIN/MAX/AVG data

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibel Meter Premium Weekly | $3.99 | per 7 days |
| Noise Spectrum Detector VIP | $8.99 | per month |
| Noise Frequency Checker VIP | $19.99 | per 3 months |
| Sound Level Analyzer dB VIP | $29.99 | per year |


## Frequently asked questions

### Is Low Frequency Detector free?

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

### Is Decibel Meter free?

Decibel Meter is free to download, with in-app purchases available.

### Which has better reviews, Low Frequency Detector or Decibel Meter?

Decibel Meter is rated higher. Low Frequency Detector averages 2.8 out of 5 from 6 ratings, while Decibel Meter averages 3.5 from 55 ratings.

### Do Low Frequency Detector or Decibel Meter have ads?

Neither Low Frequency Detector nor Decibel Meter shows ads.

### Which is updated more often, Low Frequency Detector or Decibel Meter?

Low Frequency Detector ships an update every 9 months, and Decibel Meter every 11 months. Most recently, Low Frequency Detector was updated on October 26, 2026 and Decibel Meter on October 27, 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.*