# Synapse vs EMF Detector

The clearest difference is in-app purchases: Synapse at none against EMF Detector's 3. EMF Detector's advantage is update cadence (every 2 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. EMF Detector sells 2 in-app purchases, starting at $4.99 per month. Synapse asks for nothing beyond the download.

Synapse ships an update every 7 months, EMF Detector every 2 weeks. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Synapse | EMF Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (319 ratings)](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713/reviews)** |
| Number of ratings | — | **319** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 78 MB | 11 MB |
| Requires iOS | **12.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zinc Digital](https://appshunter.io/developer/1147605401) | [新雨 李](https://appshunter.io/developer/1559932632) |

## What reviewers say

### Synapse

[App page](https://appshunter.io/ios/app/synapse-graff/id1567939772)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Synapse free?

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

### Is EMF Detector free?

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

### Do Synapse or EMF Detector have ads?

Neither Synapse nor EMF Detector shows ads.

### Which is updated more often, Synapse or EMF Detector?

Synapse ships an update every 7 months, and EMF Detector every 2 weeks. Most recently, Synapse was updated on October 10, 2026 and EMF Detector on October 13, 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.*