# Rdio Scanner vs EMF Detector

The clearest difference is rating: EMF Detector at 4.3 against Rdio Scanner's 3.3. EMF Detector also leads on monetization model (free with in-app purchases vs subscription) and ratings volume (319 vs 84). Rdio Scanner's advantage is review sentiment (44% vs 25%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Rdio Scanner sells 1 in-app purchase, starting at $39.99 per year and EMF Detector sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

EMF Detector holds the better App Store score, 4.3 against 3.3. Both are backed by a comparable volume of ratings — 84 and 319 respectively. Written reviews complicate that: 44% of Rdio Scanner's written reviews are positive against 25% of EMF Detector's, so the app with the better star average is not the one people write more warmly about.

Rdio Scanner ships an update monthly, EMF Detector every 2 weeks. Both last shipped on September 21, 2026.

## The numbers

| Metric | Rdio Scanner | EMF Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (84 ratings)](https://appshunter.io/ios/app/rdio-scanner/id1563065667/reviews) | **[4.3 (319 ratings)](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713/reviews)** |
| Number of ratings | 84 | **319** |
| Positive reviews | **44.2% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 52 MB | 11 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Saubeo Solutions](https://appshunter.io/developer/1563065669) | [新雨 李](https://appshunter.io/developer/1559932632) |

## What reviewers say

### Rdio Scanner

[App page](https://appshunter.io/ios/app/rdio-scanner/id1563065667)

This is the native client for an open-source project that scans and identifies audio. It offers premium features through an annual subscription, which automatically renews unless canceled.

**Highlights:** Native client application, Premium features, Annual subscription, Automatic renewal, Cancel anytime

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $39.99 | per year |


### EMF Detector

[App page](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713)

Transform your iPhone into an EMF detector to monitor electromagnetic fields. Identify radiation levels in various environments to assess safety at home, work, or in public spaces. Gain insights to make informed decisions about your surroundings.

**Highlights:** EMF monitoring, Electromagnetic field detection, Radiation level measurement, Environmental safety assessment, Real-time EMF readings

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| unlimited features | $4.99 | per month |
| unlimited features | $14.99 | one-time |


## Frequently asked questions

### Is Rdio Scanner free?

Rdio Scanner is free to download, with in-app purchases available.

### Is EMF Detector free?

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

### Which has better reviews, Rdio Scanner or EMF Detector?

EMF Detector is rated higher. Rdio Scanner averages 3.3 out of 5 from 84 ratings, while EMF Detector averages 4.3 from 319 ratings.

### Do Rdio Scanner or EMF Detector have ads?

Neither Rdio Scanner nor EMF Detector shows ads.

### Which is updated more often, Rdio Scanner or EMF Detector?

Rdio Scanner ships an update monthly, and EMF Detector every 2 weeks. Most recently, Rdio Scanner was updated on September 21, 2026 and EMF Detector on September 21, 2026.

---

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