# Electromagnetic EMF Detector vs Sound Spectrum Analysis

The clearest difference is price: Sound Spectrum Analysis at Free against Electromagnetic EMF Detector's $1.99. Electromagnetic EMF Detector's advantage is rating (4.4 vs 3.6) and review sentiment (79% vs 58%). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Sound Spectrum Analysis is free to download; Electromagnetic EMF Detector costs $1.99 up front. Electromagnetic EMF Detector sells 2 one-off in-app purchases and Sound Spectrum Analysis sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Electromagnetic EMF Detector holds the better App Store score, 4.4 against 3.6. That said, the two scores are not equally well evidenced: Electromagnetic EMF Detector has 212 ratings behind it against 42, so its average is the more settled of the two. Written reviews point the same way: 79% of Electromagnetic EMF Detector's written reviews are positive against 58% of Sound Spectrum Analysis's.

Both ship on a similar rhythm, roughly every 5 weeks. Both last shipped on November 6, 2026.

## The numbers

| Metric | Electromagnetic EMF Detector | Sound Spectrum Analysis |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.4 (212 ratings)](https://appshunter.io/ios/app/electromagnetic-emf-detector/id1031336728/reviews)** | [3.6 (42 ratings)](https://appshunter.io/ios/app/sound-spectrum-analysis/id1434975523/reviews) |
| Number of ratings | **212** | 42 |
| Positive reviews | **79.5% of reviews** | 58.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 61 MB | 5 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jose Bello](https://appshunter.io/developer/1013437387) | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) |

## What reviewers say

### Electromagnetic EMF Detector

[App page](https://appshunter.io/ios/app/electromagnetic-emf-detector/id1031336728)

This app simulates detecting electromagnetic fields and electrosmog using your device's compass. It identifies ferromagnetic metals and can alert you to potential sources of radio-frequency EMF from common household appliances. While intended for entertainment, it records measurements with timestamps and offers a guide to radio-frequency guidelines.

**Highlights:** Simulates EMF and electrosmog detection, Detects ferromagnetic metals, Warning beep near emissions, Records measurements with timestamps, Table guide for radio-frequency guidelines, Detects magnetic force on three axes

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EMF Waves and time unlimited | $0.99 | one-time |
| Remove Top Banner | $0.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate readings
- 💡 Helpful for learning about EMF
- 🔍 Convenient tool for detecting EMF levels
- 🔋 Works well, no battery issues

**What reviewers complain about**

- 🐛 Inconsistent readings
- 🔍 Limited measurement range
- 💰 Paywall issues, additional charges
- 🤔 Unclear instructions and data interpretation

**Reported bugs**

- App freezes or crashes
- Incorrect or unreliable EMF readings

**Requested features**

- Add more detailed information and analysis
- Improve accuracy and measurement range
- Provide better instructions and guidance
- Integrate with other EMF monitoring tools


### 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 Electromagnetic EMF Detector free?

Electromagnetic EMF Detector costs $1.99, and also offers in-app purchases.

### Is Sound Spectrum Analysis free?

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

### Which has better reviews, Electromagnetic EMF Detector or Sound Spectrum Analysis?

Electromagnetic EMF Detector is rated higher. Electromagnetic EMF Detector averages 4.4 out of 5 from 212 ratings, while Sound Spectrum Analysis averages 3.6 from 42 ratings.

### Do Electromagnetic EMF Detector or Sound Spectrum Analysis have ads?

Neither Electromagnetic EMF Detector nor Sound Spectrum Analysis shows ads.

### Which is updated more often, Electromagnetic EMF Detector or Sound Spectrum Analysis?

Electromagnetic EMF Detector ships an update every 5 weeks, and Sound Spectrum Analysis every 5 weeks. Most recently, Electromagnetic EMF Detector was updated on November 6, 2026 and Sound Spectrum Analysis on November 6, 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.*