# Marine Docker vs Magnetic Field Scanner

The clearest difference is in-app purchases: Marine Docker at none against Magnetic Field Scanner's 3. Marine Docker also leads on iOS requirement (13.4 vs 17.6). Magnetic Field Scanner's advantage is update cadence (every 2 months vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Magnetic Field Scanner sells 3 in-app purchases, starting at $5.99 per month. Marine Docker asks for nothing beyond the download.

Marine Docker ships an update every 4 months, Magnetic Field Scanner every 2 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Marine Docker | Magnetic Field Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (12 ratings)](https://appshunter.io/ios/app/magnetic-field-scanner/id6747452469/reviews)** |
| Number of ratings | — | **12** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 61 MB | 5 MB |
| Requires iOS | **13.4** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kontis d.o.o.](https://appshunter.io/developer/1745258669) | [Hoang Le](https://appshunter.io/developer/1763197902) |

## What reviewers say

### Marine Docker

[App page](https://appshunter.io/ios/app/marine-docker/id6502378616)

**Features:** macOS Compatibility

**In-app purchases:** none


### Magnetic Field Scanner

[App page](https://appshunter.io/ios/app/magnetic-field-scanner/id6747452469)

This utility app uses your phone's magnetometer to detect unusual magnetic field spikes, which may indicate the presence of hidden electronic devices. It provides real-time alerts, visual graphs, and customizable sensitivity to help you scan your surroundings for potential privacy threats.

**Highlights:** Real-time magnetic field scanning, Hidden device alerts with adjustable sensitivity, Live visual graph of magnetic signals, 3-axis sensor readouts, Data history for pattern spotting, Offline and private operation

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MagnetoScanner Month Pass | $5.99 | per month |
| MagnetoScanner Year PAss | $29.99 | per year |
| MagnetoScanner Lifetime Access | $39.99 | one-time |


## Frequently asked questions

### Is Marine Docker free?

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

### Is Magnetic Field Scanner free?

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

### Do Marine Docker or Magnetic Field Scanner have ads?

Neither Marine Docker nor Magnetic Field Scanner shows ads.

### Which is updated more often, Marine Docker or Magnetic Field Scanner?

Marine Docker ships an update every 4 months, and Magnetic Field Scanner every 2 months. Most recently, Marine Docker was updated on October 27, 2026 and Magnetic Field Scanner on October 30, 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.*