# Low Frequency Detector vs EMF Detector

The clearest difference is price: EMF Detector at Free against Low Frequency Detector's $9.99. EMF Detector also leads on rating (4.3 vs 2.8) and update cadence (every 2 weeks vs every 9 months). Low Frequency Detector's advantage is in-app purchases (none vs 3) and review sentiment (50% vs 25%). On ads there is nothing between them.

EMF Detector is free to download; Low Frequency Detector costs $9.99 up front. EMF Detector sells 2 in-app purchases, starting at $4.99 per month. Low Frequency Detector asks for nothing beyond the download.

EMF Detector holds the better App Store score, 4.3 against 2.8. That said, the two scores are not equally well evidenced: EMF Detector has 319 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 50% of Low Frequency Detector's written reviews are positive against 25% of EMF Detector's, so the app with the better star average is not the one people write more warmly about.

Low Frequency Detector ships an update every 9 months, EMF Detector every 2 weeks. The most recent releases landed on October 6, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Low Frequency Detector | EMF Detector |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [2.8 (6 ratings)](https://appshunter.io/ios/app/low-frequency-detector/id1196584147/reviews) | **[4.3 (319 ratings)](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713/reviews)** |
| Number of ratings | 6 | **319** |
| Positive reviews | **50.0% of reviews** | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 11 MB |
| Requires iOS | 26.2 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [新雨 李](https://appshunter.io/developer/1559932632) |

## 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


### EMF Detector

[App page](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713)

Transform your iPhone into an EMF detector to monitor electromagnetic fields. Identify radiation levels in various environments to assess safety at home, work, or in public spaces. Gain insights to make informed decisions about your surroundings.

**Highlights:** EMF monitoring, Electromagnetic field detection, Radiation level measurement, Environmental safety assessment, Real-time EMF readings

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| unlimited features | $4.99 | per month |
| unlimited features | $14.99 | one-time |


## Frequently asked questions

### Is Low Frequency Detector free?

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

### Is EMF Detector free?

EMF Detector is free to download, with in-app purchases available.

### Which has better reviews, Low Frequency Detector or EMF Detector?

EMF Detector is rated higher. Low Frequency Detector averages 2.8 out of 5 from 6 ratings, while EMF Detector averages 4.3 from 319 ratings.

### Do Low Frequency Detector or EMF Detector have ads?

Neither Low Frequency Detector nor EMF Detector shows ads.

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

Low Frequency Detector ships an update every 9 months, and EMF Detector every 2 weeks. Most recently, Low Frequency Detector was updated on October 6, 2026 and EMF Detector on October 18, 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.*