# FactorySense Sonar vs EMF Detector

The clearest difference is in-app purchases: FactorySense Sonar at none against EMF Detector's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. EMF Detector sells 2 in-app purchases, starting at $4.99 per month. FactorySense Sonar asks for nothing beyond the download.

## The numbers

| Metric | FactorySense Sonar | EMF Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (319 ratings)](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713/reviews)** |
| Number of ratings | — | **319** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 11 MB |
| Requires iOS | 13.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Factory Sense](https://appshunter.io/developer/1474553368) | [新雨 李](https://appshunter.io/developer/1559932632) |

## What reviewers say

### FactorySense Sonar

[App page](https://appshunter.io/ios/app/factorysense-sonar/id6448760613)

**Features:** macOS Compatibility

**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 FactorySense Sonar free?

FactorySense Sonar is free to download, with no in-app purchases.

### Is EMF Detector free?

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

### Do FactorySense Sonar or EMF Detector have ads?

Neither FactorySense Sonar nor EMF Detector shows ads.

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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.*