# Smart Interphone vs EMFMeter

The clearest difference is in-app purchases: Smart Interphone at none against EMFMeter's 3. Smart Interphone also leads on ads (none vs shown) and iOS requirement (9.0 vs 15.6). EMFMeter's advantage is update cadence (every 2 months vs every 9 months). On price and device support there is nothing between them.

Both are free to download. EMFMeter sells 3 in-app purchases, starting at $3.99 per 7 days. Smart Interphone asks for nothing beyond the download.

Smart Interphone ships an update every 9 months, EMFMeter every 2 months. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Smart Interphone | EMFMeter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (98 ratings)](https://appshunter.io/ios/app/emfmeter-radiation-reader/id6747639722/reviews)** |
| Number of ratings | — | **98** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 145 MB | 187 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tzu-Lung Chang](https://appshunter.io/developer/623730215) | [Neuralful Ai ltd](https://appshunter.io/developer/1707749156) |

## What reviewers say

### Smart Interphone

[App page](https://appshunter.io/ios/app/smart-interphone/id6478376348)

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

**In-app purchases:** none


### EMFMeter

[App page](https://appshunter.io/ios/app/emfmeter-radiation-reader/id6747639722)

This tool transforms your smartphone into a real-time electromagnetic field scanner. It visualizes EMF readings, detects studs and metal objects behind walls, and alerts you to high EMF levels. You can also track EMF source direction and export data for analysis.

**Highlights:** Real-time EMF detection, Electromagnetic field visualization, Built-in stud finder, High EMF alerts, EMF source direction tracking, CSV data export, Session logging

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| week | $3.99 | per 7 days |
| yearlypro | $9.99 | per year |
| emfmeter | $19.99 | one-time |


## Frequently asked questions

### Is Smart Interphone free?

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

### Is EMFMeter free?

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

### Do Smart Interphone or EMFMeter have ads?

EMFMeter shows ads; Smart Interphone does not.

### Which is updated more often, Smart Interphone or EMFMeter?

Smart Interphone ships an update every 9 months, and EMFMeter every 2 months. Most recently, Smart Interphone was updated on October 1, 2026 and EMFMeter on October 12, 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.*