# SP Music Box vs Ghost Detector EMF Necrometer

The clearest difference is review sentiment: SP Music Box at 100% against Ghost Detector EMF Necrometer's 54%. SP Music Box also leads on rating (5.0 vs 4.0) and in-app purchases (none vs 4). Ghost Detector EMF Necrometer's advantage is price (Free vs $2.99) and update cadence (every 10 days vs every 5 months). On ads, device support and iOS requirement there is nothing between them.

Ghost Detector EMF Necrometer is free to download; SP Music Box costs $2.99 up front. Ghost Detector EMF Necrometer sells 4 in-app purchases, starting at $4.99 per 7 days. SP Music Box asks for nothing beyond the download.

SP Music Box holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Ghost Detector EMF Necrometer has 434 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of SP Music Box's written reviews are positive against 54% of Ghost Detector EMF Necrometer's.

SP Music Box ships an update every 5 months, Ghost Detector EMF Necrometer every 10 days. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | SP Music Box | Ghost Detector EMF Necrometer |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sp-music-box/id6504913402/reviews)** | [4.0 (434 ratings)](https://appshunter.io/ios/app/ghost-detector-emf-necrometer/id6754881764/reviews) |
| Number of ratings | 1 | **434** |
| Positive reviews | **100.0% of reviews** | 54.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 10 days** |
| Monetization | **Paid** | Subscription |
| Best chart rank | **#199** | — |
| Size | 9 MB | 68 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 9+ | 9+ |
| Developer | [Haunted Scotland Investigates LTD](https://appshunter.io/developer/1735305312) | [Boss Web SRL](https://appshunter.io/developer/1839514881) |

## What reviewers say

### SP Music Box

[App page](https://appshunter.io/ios/app/sp-music-box/id6504913402)

**Currently charting:** #199 Top Paid · Entertainment (US App Store)

This app uses your phone's sensors to detect paranormal activity by alerting you to EMF fluctuations, motion, and magnetic heading changes. It plays sounds and lights up the screen when sensors are triggered, logging events for later review.

**Highlights:** EMF fluctuation detection, Motion and rotation sensing, Magnetic heading changes, Customizable alert sounds, Sensor activation logging, Real-time sensor status display

**In-app purchases:** none


### Ghost Detector EMF Necrometer

[App page](https://appshunter.io/ios/app/ghost-detector-emf-necrometer/id6754881764)

This app combines EMF detection with a spirit box to facilitate paranormal communication. It offers professional-grade tools for real-time environmental monitoring and authentic voice manifestations, designed for both enthusiasts and experienced investigators.

**Highlights:** EMF Magnetic Energy Detection, DR60 Spirit Box Sound Bank, Phoneme-Based Audio Generation, 9 Sound Banks and White Noise, Spoken Response System (Text-to-Speech), Built-In Audio Effects (Echo, Reverb), Advanced Paranormal Tools (Waveform Display)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $4.99 | per 7 days |
| Monthly Plan | $9.99 | per month |
| Special Offer | $14.99 | one-time |
| Lifetime Plan | $29.99 | one-time |


## Frequently asked questions

### Is SP Music Box free?

SP Music Box costs $2.99, with no in-app purchases.

### Is Ghost Detector EMF Necrometer free?

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

### Which has better reviews, SP Music Box or Ghost Detector EMF Necrometer?

SP Music Box is rated higher. SP Music Box averages 5.0 out of 5 from 1 ratings, while Ghost Detector EMF Necrometer averages 4.0 from 434 ratings.

### Do SP Music Box or Ghost Detector EMF Necrometer have ads?

Neither SP Music Box nor Ghost Detector EMF Necrometer shows ads.

### Which is updated more often, SP Music Box or Ghost Detector EMF Necrometer?

SP Music Box ships an update every 5 months, and Ghost Detector EMF Necrometer every 10 days. Most recently, SP Music Box was updated on October 8, 2026 and Ghost Detector EMF Necrometer on October 20, 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.*