# EMF Radiation Detector Reader vs Letter Together

The clearest difference is in-app purchases: Letter Together at none against EMF Radiation Detector Reader's 2. Letter Together also leads on ads (none vs shown) and update cadence (monthly vs every 6 months). On price 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. Letter Together asks for nothing beyond the download.

EMF Radiation Detector Reader ships an update every 6 months, Letter Together monthly. The most recent releases landed on October 21, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | EMF Radiation Detector Reader | Letter Together |
| --- | --- | --- |
| 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 | 53.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 30 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rounding Squares BV](https://appshunter.io/developer/976539506) | [Continuum Games, Inc.](https://appshunter.io/developer/1571872555) |

## 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


### Letter Together

[App page](https://appshunter.io/ios/app/letter-together/id1603814059)

**Features:** macOS Compatibility

**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 Letter Together free?

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

### Do EMF Radiation Detector Reader or Letter Together have ads?

EMF Radiation Detector Reader shows ads; Letter Together does not.

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

EMF Radiation Detector Reader ships an update every 6 months, and Letter Together monthly. Most recently, EMF Radiation Detector Reader was updated on October 21, 2026 and Letter Together on October 2, 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.*