# SP Music Box vs spirit trace

The clearest difference is price: spirit trace at Free against SP Music Box's $2.99. spirit trace also leads on update cadence (every 3 weeks vs every 5 months) and device support (3 vs 1). SP Music Box's advantage is chart position (#199 vs unranked). On ads and in-app purchases there is nothing between them.

spirit trace is free to download; SP Music Box costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SP Music Box ships an update every 5 months, spirit trace every 3 weeks. The most recent releases landed on October 8, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | SP Music Box | spirit trace |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sp-music-box/id6504913402/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Best chart rank | **#199** | — |
| Size | 9 MB | 24 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Haunted Scotland Investigates LTD](https://appshunter.io/developer/1735305312) | [Russell Charles Hodgson](https://appshunter.io/developer/1890518787) |

## 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


### spirit trace

[App page](https://appshunter.io/ios/app/spirit-trace/id6806815416)

**In-app purchases:** none


## Frequently asked questions

### Is SP Music Box free?

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

### Is spirit trace free?

spirit trace is free to download, with no in-app purchases.

### Do SP Music Box or spirit trace have ads?

Neither SP Music Box nor spirit trace shows ads.

### Which is updated more often, SP Music Box or spirit trace?

SP Music Box ships an update every 5 months, and spirit trace every 3 weeks. Most recently, SP Music Box was updated on October 8, 2026 and spirit trace on October 29, 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.*