# Captain Context vs EMF Detector

The clearest difference is in-app purchases: EMF Detector at none against Captain Context's 2. On price, update cadence, ads and device support there is nothing between them.

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

Captain Context ships an update every 6 days, EMF Detector every 4 days. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Captain Context | EMF Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (8 ratings)](https://appshunter.io/ios/app/emf-detector-emf-meter/id6759903916/reviews)** |
| Number of ratings | — | **8** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 6 days | **Every 4 days** |
| Monetization | — | Ad-supported |
| Size | 23 MB | 60 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Carlo Schaay](https://appshunter.io/developer/878678269) | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) |

## What reviewers say

### Captain Context

[App page](https://appshunter.io/ios/app/captain-context/id6757968886)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $4.99 | per month |
| Premium Annual | $49.99 | per year |


### EMF Detector

[App page](https://appshunter.io/ios/app/emf-detector-emf-meter/id6759903916)

This utility app transforms your iPhone's magnetometer into an electromagnetic field scanner. It offers three distinct modes for safety, general readings, and paranormal investigation, with features like measurement history and comparison.

**Highlights:** Magnetometer-based EMF scanning, Auto, Safety, and Paranormal modes, Measurement history with trend charts, Notes and favorites for readings, Compare saved readings, Calibration offset, Share readings as image or CSV

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

**In-app purchases:** none


## Frequently asked questions

### Is Captain Context free?

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

### Is EMF Detector free?

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

### Do Captain Context or EMF Detector have ads?

Both Captain Context and EMF Detector show ads.

### Which is updated more often, Captain Context or EMF Detector?

Captain Context ships an update every 6 days, and EMF Detector every 4 days. Most recently, Captain Context was updated on October 9, 2026 and EMF Detector on October 14, 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.*