# EMF Radiation Detector Reader vs Spectrum SDR (RTL

EMF Radiation Detector Reader and Spectrum SDR (RTL both sit at 4.5 stars, but that hides the real split: 100% of Spectrum SDR (RTL's written reviews are positive against 54% of EMF Radiation Detector Reader's. Spectrum SDR (RTL also leads on ads (none vs shown) and update cadence (every 11 days vs every 6 months). EMF Radiation Detector Reader's advantage is ratings volume (5K vs 2) and iOS requirement (15.6 vs 26.0). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. EMF Radiation Detector Reader sells 2 in-app purchases, starting at $1.99 per 7 days and Spectrum SDR (RTL sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.5 for EMF Radiation Detector Reader against 4.5 for Spectrum SDR (RTL. That said, the two scores are not equally well evidenced: EMF Radiation Detector Reader has 5K ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 54% of EMF Radiation Detector Reader's written reviews are positive against 100% of Spectrum SDR (RTL's.

EMF Radiation Detector Reader ships an update every 6 months, Spectrum SDR (RTL every 11 days. The most recent releases landed on October 27, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | EMF Radiation Detector Reader | Spectrum SDR (RTL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (5K ratings)](https://appshunter.io/ios/app/emf-radiation-detector-reader/id1507914734/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/spectrum-sdr-rtl-sdr/id6764391865/reviews) |
| Number of ratings | **5K** | 2 |
| Positive reviews | 53.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 11 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 7 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Rounding Squares BV](https://appshunter.io/developer/976539506) | [James Mainwaring](https://appshunter.io/developer/1895761181) |

## What reviewers say

### EMF Radiation Detector Reader

[App page](https://appshunter.io/ios/app/emf-radiation-detector-reader/id1507914734)

Detect electromagnetic fields (EMF) around you using your phone's sensors. Identify high-radiation zones in your home and workplace to better organize your environment and potentially improve well-being. Measure EMF emitted by various electronic devices and appliances.

**Highlights:** Detect EMF radiation, Measure EMF levels, Identify risk zones, Organize living space, Measure appliance emissions, No expensive equipment needed

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EMF Radiation Detector Premium Week | $1.99 | per 7 days |
| EMF Radiation Detector Premium Year | $9.99 | per year |

**What reviewers like**

- 👍 Works well around microwave
- 👍 Consistent results
- 👍 Useful tool for detecting EMF
- 👍 Legit EMF detection
- 👍 Helps find problem areas

**What reviewers complain about**

- 🐛 Ads cover reading numbers
- 🔍 Unclear how to interpret readings
- ⚠️ Questionable accuracy, only detects magnets
- 🔍 No explanation of safe/unsafe levels
- 🐛 Doesn't detect radio frequencies

**Reported bugs**

- Readings inconsistent or inaccurate
- Doesn't work as expected, only detects magnets

**Requested features**

- Add sound or vibration alerts for high EMF
- Provide more information on EMF levels and safety
- Improve layout to avoid ads covering readings


### Spectrum SDR (RTL

[App page](https://appshunter.io/ios/app/spectrum-sdr-rtl-sdr/id6764391865)

Explore radio signals with your RTL-SDR dongle. Listen to AM/FM/SSB/CW, view FFT and waterfall displays, and customize your experience. Requires a remote rtl_tcp instance over WiFi.

**Highlights:** Full frequency range support, AM, FM, SSB, CW reception, FFT and Waterfall displays, Adjustable sample rates, Bias tee and gain controls, Squelch functionality, Customizable display options

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


## Frequently asked questions

### Is EMF Radiation Detector Reader free?

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

### Is Spectrum SDR (RTL free?

Spectrum SDR (RTL is free to download, with in-app purchases available.

### Which has better reviews, EMF Radiation Detector Reader or Spectrum SDR (RTL?

EMF Radiation Detector Reader is rated higher. EMF Radiation Detector Reader averages 4.5 out of 5 from 5K ratings, while Spectrum SDR (RTL averages 4.5 from 2 ratings.

### Do EMF Radiation Detector Reader or Spectrum SDR (RTL have ads?

EMF Radiation Detector Reader shows ads; Spectrum SDR (RTL does not.

### Which is updated more often, EMF Radiation Detector Reader or Spectrum SDR (RTL?

EMF Radiation Detector Reader ships an update every 6 months, and Spectrum SDR (RTL every 11 days. Most recently, EMF Radiation Detector Reader was updated on October 27, 2026 and Spectrum SDR (RTL on October 10, 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.*