# Electromagnetic Detector PRO vs GUTCalc Physics Unit Converter

The clearest difference is price: GUTCalc Physics Unit Converter at Free against Electromagnetic Detector PRO's $4.99. GUTCalc Physics Unit Converter also leads on review sentiment (100% vs 57%) and rating (5.0 vs 4.3). Electromagnetic Detector PRO's advantage is in-app purchases (none vs 1) and iOS requirement (11.2 vs 13.0). On ratings volume, ads and device support there is nothing between them.

GUTCalc Physics Unit Converter is free to download; Electromagnetic Detector PRO costs $4.99 up front. GUTCalc Physics Unit Converter sells 1 one-off in-app purchase. Electromagnetic Detector PRO asks for nothing beyond the download.

GUTCalc Physics Unit Converter holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 12 and 6 respectively. Written reviews point the same way: 57% of Electromagnetic Detector PRO's written reviews are positive against 100% of GUTCalc Physics Unit Converter's.

Electromagnetic Detector PRO ships an update every 14 months, GUTCalc Physics Unit Converter every 4 months. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Electromagnetic Detector PRO | GUTCalc Physics Unit Converter |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.3 (12 ratings)](https://appshunter.io/ios/app/electromagnetic-detector-pro/id1350384533/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/gutcalc-physics-unit-converter/id1526914857/reviews)** |
| Number of ratings | **12** | 6 |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 4 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 55 MB | 3 MB |
| Requires iOS | **11.2** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Gregorio Martin Bello](https://appshunter.io/developer/567988393) | [Timothy Wiser](https://appshunter.io/developer/1526914859) |

## What reviewers say

### Electromagnetic Detector PRO

[App page](https://appshunter.io/ios/app/electromagnetic-detector-pro/id1350384533)

Transform your device into an electromagnetic field detector to identify high-risk wireless zones and potential sources of radiation. Receive warnings for strong magnetic fields and record measurements with timestamps. Useful for detecting metallic objects behind walls or underground.

**Highlights:** Detect electromagnetic fields (EMF), Warning beep for high radiation, Measure magnetic force on three axes, Record readings with timestamps, Store up to 100 records, Send measures via email

**Features:** macOS Compatibility

**In-app purchases:** none


### GUTCalc Physics Unit Converter

[App page](https://appshunter.io/ios/app/gutcalc-physics-unit-converter/id1526914857)

This calculator handles complex physics calculations with units. It supports SI, natural, and CGS units, physical constants, and functions. It automatically converts units and flags algebraic errors, with an option to upgrade for advanced organization and syncing features.

**Highlights:** SI, Natural, and CGS unit modes, Automatic unit conversion, Physical constants and functions, Implied multiplication, Custom keyboards, Unit checking for algebraic errors, Share and save results

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GUTCalc Pro | $2.99 | one-time |


## Frequently asked questions

### Is Electromagnetic Detector PRO free?

Electromagnetic Detector PRO costs $4.99, with no in-app purchases.

### Is GUTCalc Physics Unit Converter free?

GUTCalc Physics Unit Converter is free to download, with in-app purchases available.

### Which has better reviews, Electromagnetic Detector PRO or GUTCalc Physics Unit Converter?

GUTCalc Physics Unit Converter is rated higher. Electromagnetic Detector PRO averages 4.3 out of 5 from 12 ratings, while GUTCalc Physics Unit Converter averages 5.0 from 6 ratings.

### Do Electromagnetic Detector PRO or GUTCalc Physics Unit Converter have ads?

Neither Electromagnetic Detector PRO nor GUTCalc Physics Unit Converter shows ads.

### Which is updated more often, Electromagnetic Detector PRO or GUTCalc Physics Unit Converter?

Electromagnetic Detector PRO ships an update every 14 months, and GUTCalc Physics Unit Converter every 4 months. Most recently, Electromagnetic Detector PRO was updated on October 24, 2026 and GUTCalc Physics Unit Converter on October 16, 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.*