# SpectraEMF vs EMF Detector・Ghost Detector

The clearest difference is ads: SpectraEMF at none against EMF Detector・Ghost Detector's shown. SpectraEMF also leads on update cadence (every 4 days vs every 3 weeks). EMF Detector・Ghost Detector's advantage is iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. SpectraEMF sells 1 one-off in-app purchase and EMF Detector・Ghost Detector sells 2 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

SpectraEMF ships an update every 4 days, EMF Detector・Ghost Detector every 3 weeks. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SpectraEMF | EMF Detector・Ghost Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/emf-detectorghost-detector/id6790258196/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 99 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 9+ | 9+ |
| Developer | [Vikram Joshi](https://appshunter.io/developer/1875452225) | [ZeroPlay Ltd.](https://appshunter.io/developer/1500119722) |

## What reviewers say

### SpectraEMF

[App page](https://appshunter.io/ios/app/spectraemf/id6782989617)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SpectraEMF Pro | $4.99 | one-time |


### EMF Detector・Ghost Detector

[App page](https://appshunter.io/ios/app/emf-detectorghost-detector/id6790258196)

This app transforms your phone into a real-time magnetic field detector, displaying readings in microtesla or milligauss. It features a detailed instrument panel, alert functions, and a unique ghost detector mode for entertainment. Record and export your sessions for later review.

**Highlights:** Real-time magnetic field detection, Instrument panel with live readings and graphs, Adjustable threshold alerts, Ghost Detector mode, Session recording and CSV export, Offline functionality

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $7.99 | per 7 days |
| Monthly | $19.99 | per month |


## Frequently asked questions

### Is SpectraEMF free?

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

### Is EMF Detector・Ghost Detector free?

EMF Detector・Ghost Detector is free to download, with in-app purchases available.

### Do SpectraEMF or EMF Detector・Ghost Detector have ads?

EMF Detector・Ghost Detector shows ads; SpectraEMF does not.

### Which is updated more often, SpectraEMF or EMF Detector・Ghost Detector?

SpectraEMF ships an update every 4 days, and EMF Detector・Ghost Detector every 3 weeks. Most recently, SpectraEMF was updated on October 9, 2026 and EMF Detector・Ghost Detector 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.*