# Electromagnetic Detector PRO vs SpoolMate

The clearest difference is price: SpoolMate at Free against Electromagnetic Detector PRO's $4.99. SpoolMate 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 4) and ads (none vs shown).

SpoolMate is free to download; Electromagnetic Detector PRO costs $4.99 up front. SpoolMate sells 4 one-off in-app purchases. Electromagnetic Detector PRO asks for nothing beyond the download.

SpoolMate holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 12 and 3 respectively. Written reviews point the same way: 57% of Electromagnetic Detector PRO's written reviews are positive against 100% of SpoolMate's.

Electromagnetic Detector PRO ships an update every 14 months, SpoolMate every 2 weeks. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Electromagnetic Detector PRO | SpoolMate |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.3 (12 ratings)](https://appshunter.io/ios/app/electromagnetic-detector-pro/id1350384533/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/spoolmate/id6759874466/reviews)** |
| Number of ratings | **12** | 3 |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 14 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 55 MB | 8 MB |
| Requires iOS | **11.2** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Gregorio Martin Bello](https://appshunter.io/developer/567988393) | [Chris TeSelle](https://appshunter.io/developer/445300197) |

## 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


### SpoolMate

[App page](https://appshunter.io/ios/app/spoolmate/id6759874466)

Track your 3D printing filament inventory with this app. Easily monitor remaining filament, log usage after prints, and receive low-stock notifications to ensure you always have enough material for your projects.

**Highlights:** Track filament levels, Log filament usage, Low-stock notifications, Support for common materials, Print history per spool, One-tap reordering

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |
| SpoolMate+ | $14.99 | one-time |


## Frequently asked questions

### Is Electromagnetic Detector PRO free?

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

### Is SpoolMate free?

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

### Which has better reviews, Electromagnetic Detector PRO or SpoolMate?

SpoolMate is rated higher. Electromagnetic Detector PRO averages 4.3 out of 5 from 12 ratings, while SpoolMate averages 5.0 from 3 ratings.

### Do Electromagnetic Detector PRO or SpoolMate have ads?

SpoolMate shows ads; Electromagnetic Detector PRO does not.

### Which is updated more often, Electromagnetic Detector PRO or SpoolMate?

Electromagnetic Detector PRO ships an update every 14 months, and SpoolMate every 2 weeks. Most recently, Electromagnetic Detector PRO was updated on October 3, 2026 and SpoolMate on October 1, 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.*