# TrueEntropy vs EMF Radiation Detector Reader

The clearest difference is in-app purchases: TrueEntropy at none against EMF Radiation Detector Reader's 2. TrueEntropy also leads on ads (none vs shown) and review sentiment (67% vs 53%). EMF Radiation Detector Reader's advantage is update cadence (every 6 months vs every 41 months) and ratings volume (5K vs 11). On price, rating 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. TrueEntropy asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.5 for TrueEntropy against 4.5 for EMF Radiation Detector Reader. That said, the two scores are not equally well evidenced: EMF Radiation Detector Reader has 5K ratings behind it against 11, so its average is the more settled of the two. Written reviews are what separate them: 67% of TrueEntropy's written reviews are positive against 53% of EMF Radiation Detector Reader's.

TrueEntropy ships an update every 41 months, EMF Radiation Detector Reader every 6 months. The most recent releases landed on October 9, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | TrueEntropy | EMF Radiation Detector Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (11 ratings)](https://appshunter.io/ios/app/trueentropy/id1299321174/reviews) | [4.5 (5K ratings)](https://appshunter.io/ios/app/emf-radiation-detector-reader/id1507914734/reviews) |
| Number of ratings | 11 | **5K** |
| Positive reviews | **66.7% of reviews** | 53.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 41 months | **Every 6 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 10 MB | 20 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vault12, Inc.](https://appshunter.io/developer/1073276506) | [Rounding Squares BV](https://appshunter.io/developer/976539506) |

## What reviewers say

### TrueEntropy

[App page](https://appshunter.io/ios/app/trueentropy/id1299321174)

This app leverages your smartphone's camera to produce genuine random numbers by capturing thermal noise. It generates a high volume of entropy, suitable for cryptographic purposes, and can output data locally or remotely.

**Highlights:** Generate true random numbers from thermal noise, Utilizes smartphone camera sensor, High volume entropy generation, Output binary files locally, Send entropy via cryptographic relays, Continuous generation mode

**Features:** macOS Compatibility

**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 TrueEntropy free?

TrueEntropy 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, TrueEntropy or EMF Radiation Detector Reader?

TrueEntropy and EMF Radiation Detector Reader are both rated 4.5 out of 5 on the App Store, from 11 and 5K ratings respectively.

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

EMF Radiation Detector Reader shows ads; TrueEntropy does not.

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

TrueEntropy ships an update every 41 months, and EMF Radiation Detector Reader every 6 months. Most recently, TrueEntropy was updated on October 9, 2026 and EMF Radiation Detector Reader on October 21, 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.*