# EMF Detector vs Harp Level

The clearest difference is in-app purchases: Harp Level at none against EMF Detector's 3. EMF Detector's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.8.3). On price, update cadence and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 13, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | EMF Detector | Harp Level |
| --- | --- | --- |
| 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 | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 39 MB |
| Requires iOS | **13.0** | 15.8.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [新雨 李](https://appshunter.io/developer/1559932632) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### 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 |


### Harp Level

[App page](https://appshunter.io/ios/app/harp-level/id6748576979)

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

**In-app purchases:** none


## Frequently asked questions

### Is EMF Detector free?

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

### Is Harp Level free?

Harp Level is free to download, with no in-app purchases.

### Do EMF Detector or Harp Level have ads?

Harp Level shows ads; EMF Detector does not.

### Which is updated more often, EMF Detector or Harp Level?

EMF Detector ships an update every 2 weeks, and Harp Level every 2 weeks. Most recently, EMF Detector was updated on October 13, 2026 and Harp Level on September 29, 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.*