# EMF Radiation Detector Reader vs Theta

The clearest difference is in-app purchases: Theta at none against EMF Radiation Detector Reader's 2. Theta also leads on ads (none vs shown). EMF Radiation Detector Reader's advantage is iOS requirement (15.6 vs 17). On price, update cadence 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. Theta asks for nothing beyond the download.

EMF Radiation Detector Reader ships an update every 6 months, Theta every 3 months. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | EMF Radiation Detector Reader | Theta |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (5K ratings)](https://appshunter.io/ios/app/emf-radiation-detector-reader/id1507914734/reviews)** | — |
| Number of ratings | **5K** | — |
| Positive reviews | 53.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 18 MB |
| Requires iOS | **15.6** | 17 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 12+ |
| Developer | [Rounding Squares BV](https://appshunter.io/developer/976539506) | [Mikhail Fedorov](https://appshunter.io/developer/714735606) |

## 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


### Theta

[App page](https://appshunter.io/ios/app/theta-meter-x/id1510300649)

**In-app purchases:** none


## Frequently asked questions

### Is EMF Radiation Detector Reader free?

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

### Is Theta free?

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

### Do EMF Radiation Detector Reader or Theta have ads?

EMF Radiation Detector Reader shows ads; Theta does not.

### Which is updated more often, EMF Radiation Detector Reader or Theta?

EMF Radiation Detector Reader ships an update every 6 months, and Theta every 3 months. Most recently, EMF Radiation Detector Reader was updated on November 3, 2026 and Theta on October 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*