# EMF Field Detector RF Scanner vs smartDF

The clearest difference is price: smartDF at Free against EMF Field Detector RF Scanner's $4.99. smartDF also leads on in-app purchases (none vs 2) and ads (none vs shown). EMF Field Detector RF Scanner's advantage is device support (3 vs 1). On iOS requirement there is nothing between them.

smartDF is free to download; EMF Field Detector RF Scanner costs $4.99 up front. EMF Field Detector RF Scanner sells 2 one-off in-app purchases. smartDF asks for nothing beyond the download.

EMF Field Detector RF Scanner ships an update every 3 weeks, smartDF weekly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | EMF Field Detector RF Scanner | smartDF |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.5 (5.5K ratings)](https://appshunter.io/ios/app/emf-field-detector-rf-scanner/id836603095/reviews)** | — |
| Number of ratings | **5.5K** | — |
| Positive reviews | 83.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 56 MB | 59 MB |
| Requires iOS | 15.6 | **15.4** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Gregorio Martin Bello](https://appshunter.io/developer/567988393) | [Carlos Yordanis Lago Gonzalez](https://appshunter.io/developer/1028936188) |

## What reviewers say

### EMF Field Detector RF Scanner

[App page](https://appshunter.io/ios/app/emf-field-detector-rf-scanner/id836603095)

Detect electromagnetic fields (EMF) using your device's sensors. Get alerted to high magnetic fields and potential radiation sources in your home. Useful for identifying hidden emitters and understanding your environment.

**Highlights:** Detects electromagnetic fields (EMF), Warns of high magnetic fields with beeps, Measures magnetic force on three axes, Records readings with time and date stamps, Stores up to 100 records, Sends measurements via email

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Pack | $4.99 | one-time |
| Special Offer | $4.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate readings
- 💡 Useful for detecting EMF
- 🔍 Helps identify problem areas
- 📊 Provides clear data and insights

**What reviewers complain about**

- 🐛 Occasional glitches or inconsistent readings
- 🔋 Concerns about phone's own EMF emissions
- 💰 Premium version required for full functionality

**Reported bugs**

- App freezes or stops working after updates
- Readings not always accurate or reliable

**Requested features**

- Ability to export data
- More detailed explanations and guidance
- Compatibility with other EMF measurement devices


### smartDF

[App page](https://appshunter.io/ios/app/smartdf/id1568556062)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EMF Field Detector RF Scanner free?

EMF Field Detector RF Scanner costs $4.99, and also offers in-app purchases.

### Is smartDF free?

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

### Do EMF Field Detector RF Scanner or smartDF have ads?

EMF Field Detector RF Scanner shows ads; smartDF does not.

### Which is updated more often, EMF Field Detector RF Scanner or smartDF?

EMF Field Detector RF Scanner ships an update every 3 weeks, and smartDF weekly. Most recently, EMF Field Detector RF Scanner was updated on October 28, 2026 and smartDF on October 25, 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.*