# Device Motion Detective vs EMF Radiation Detector Reader

The clearest difference is review sentiment: EMF Radiation Detector Reader at 53% against Device Motion Detective's 0%. EMF Radiation Detector Reader also leads on rating (4.5 vs 1.0) and ratings volume (4.7K vs 1). Device Motion Detective's advantage is in-app purchases (none vs 2) and ads (none vs shown). 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. Device Motion Detective asks for nothing beyond the download.

EMF Radiation Detector Reader holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: EMF Radiation Detector Reader has 4.7K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Device Motion Detective's written reviews are positive against 53% of EMF Radiation Detector Reader's.

Device Motion Detective ships an update every 13 months, EMF Radiation Detector Reader every 7 months. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Device Motion Detective | EMF Radiation Detector Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/device-motion-detective/id884501447/reviews) | **[4.5 (4.7K ratings)](https://appshunter.io/ios/app/emf-radiation-detector-reader/id1507914734/reviews)** |
| Number of ratings | 1 | **4.7K** |
| Positive reviews | 0.0% of reviews | **53.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 7 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 20 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [方 沈](https://appshunter.io/developer/882296318) | [Rounding Squares BV](https://appshunter.io/developer/976539506) |

## What reviewers say

### Device Motion Detective

[App page](https://appshunter.io/ios/app/device-motion-detective/id884501447)

This utility app captures and stores detailed device motion data, including accelerometer, gyroscope, and magnetometer readings. Users can view real-time motion graphs or past records saved to the database. Data is recorded every second for up to 20 minutes per session.

**Highlights:** Raw accelerometer data recording, Raw gyroscope data recording, Raw magnetometer data recording, Processed device-motion data, Real-time motion graphs, Past motion record viewing, Data saved to database

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Device Motion Detective free?

Device Motion Detective is free to download, with no in-app purchases.

### Is EMF Radiation Detector Reader free?

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

### Which has better reviews, Device Motion Detective or EMF Radiation Detector Reader?

EMF Radiation Detector Reader is rated higher. Device Motion Detective averages 1.0 out of 5 from 1 ratings, while EMF Radiation Detector Reader averages 4.5 from 4.7K ratings.

### Do Device Motion Detective or EMF Radiation Detector Reader have ads?

EMF Radiation Detector Reader shows ads; Device Motion Detective does not.

### Which is updated more often, Device Motion Detective or EMF Radiation Detector Reader?

Device Motion Detective ships an update every 13 months, and EMF Radiation Detector Reader every 7 months. Most recently, Device Motion Detective was updated on October 7, 2026 and EMF Radiation Detector Reader on October 15, 2026.

---

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