# Low Frequency Detector vs Noise Guru

The clearest difference is price: Noise Guru at Free against Low Frequency Detector's $9.99. Noise Guru also leads on rating (4.6 vs 2.8) and review sentiment (88% vs 50%). On ads, in-app purchases and device support there is nothing between them.

Noise Guru is free to download; Low Frequency Detector costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Noise Guru holds the better App Store score, 4.6 against 2.8. That said, the two scores are not equally well evidenced: Noise Guru has 362 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 88% of Noise Guru's.

Low Frequency Detector ships an update every 9 months, Noise Guru monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Low Frequency Detector | Noise Guru |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [2.8 (6 ratings)](https://appshunter.io/ios/app/low-frequency-detector/id1196584147/reviews) | **[4.6 (362 ratings)](https://appshunter.io/ios/app/noise-guru-decibel-meter/id6444836813/reviews)** |
| Number of ratings | 6 | **362** |
| Positive reviews | 50.0% of reviews | **88.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 15 MB |
| Requires iOS | 26.2 | **14.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [Andrei Serykh](https://appshunter.io/developer/1626886894) |

## 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


### Noise Guru

[App page](https://appshunter.io/ios/app/noise-guru-decibel-meter/id6444836813)

Measure sound levels with precision to understand your environment and protect your hearing. Identify loud noises, monitor noise pollution, and find quiet spaces for recording. Features include a decibel dosimeter, background noise measurement, and geo-tagged recordings.

**Highlights:** Precise sound level metering (SPL), DB Dosimeter for noise exposure tracking, Background noise measurement, Noise pollution monitoring, Geo-tagged noise recordings, Unlimited recording duration

**In-app purchases:** none

**What reviewers like**

- 👍 Effective tool
- 👍 Clean interface
- 👍 Allows measuring loudness
- 👍 Visually appealing and easy to use
- 👍 Efficient and effective

**What reviewers complain about**

- 🐛 Accuracy issues compared to other apps
- 🔋 Can't play audio while using the app

**Reported bugs**

- Forced to leave a review to use the app
- Can't delete max values

**Requested features**

- Add frequency meter
- Add option to reset max/min values


## Frequently asked questions

### Is Low Frequency Detector free?

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

### Is Noise Guru free?

Noise Guru is free to download, with no in-app purchases.

### Which has better reviews, Low Frequency Detector or Noise Guru?

Noise Guru is rated higher. Low Frequency Detector averages 2.8 out of 5 from 6 ratings, while Noise Guru averages 4.6 from 362 ratings.

### Do Low Frequency Detector or Noise Guru have ads?

Neither Low Frequency Detector nor Noise Guru shows ads.

### Which is updated more often, Low Frequency Detector or Noise Guru?

Low Frequency Detector ships an update every 9 months, and Noise Guru monthly. Most recently, Low Frequency Detector was updated on November 2, 2026 and Noise Guru on November 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.*