# Electromagnetic Wave Measuring instrument vs Ghost SLS

The clearest difference is ads: Electromagnetic Wave Measuring instrument at none against Ghost SLS's shown. Electromagnetic Wave Measuring instrument also leads on monetization model (free vs ad-supported) and device support (3 vs 1). Ghost SLS's advantage is rating (4.4 vs 4.0) and ratings volume (3.6K vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ghost SLS holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: Ghost SLS has 3.6K ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Electromagnetic Wave Measuring instrument | Ghost SLS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/electromagnetic-wave-measuring-instrument/id1090924472/reviews) | **[4.4 (3.6K ratings)](https://appshunter.io/ios/app/ghost-sls/id1504150811/reviews)** |
| Number of ratings | 1 | **3.6K** |
| Positive reviews | — | 36.8% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 months |
| Monetization | **Free** | Ad-supported |
| Best chart rank | — | **#112** |
| Size | 4 MB | 50 MB |
| Requires iOS | **6.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Eun Junseok](https://appshunter.io/developer/439258050) | [OurBigAdventure, LLC](https://appshunter.io/developer/562914290) |

## What reviewers say

### Electromagnetic Wave Measuring instrument

[App page](https://appshunter.io/ios/app/electromagnetic-wave-measuring-instrument/id1090924472)

Detect electromagnetic waves emitted by electronic devices using your smartphone's magnetic sensor. Identify potential health risks associated with radiation exposure and understand safety benchmarks for various appliances.

**Highlights:** Detects electromagnetic waves, Uses phone's magnetic sensor, Identifies electronic devices, Provides safety benchmarks, Measures radiation levels

**Features:** macOS Compatibility

**In-app purchases:** none


### Ghost SLS

[App page](https://appshunter.io/ios/app/ghost-sls/id1504150811)

**Currently charting:** #112 Top Paid · Entertainment (US App Store)

This app emulates an SLS camera to detect human figures using your device's camera. It includes filters to help distinguish real detections from false positives caused by lighting. Users can capture and share photos of their findings and connect with others in a community chat.

**Highlights:** SLS camera emulation, Human figure detection, Camera filters for false positives, Photo capture and sharing, Community group chat

**In-app purchases:** none

**What reviewers like**

- 👍 Works well for ghost hunting
- 🔍 Accurately detects anomalies
- 🤖 Realistic ghost detection

**What reviewers complain about**

- 🐛 Picks up non-ghost objects as anomalies
- 💰 Ads even after paid purchase
- 🤔 Ghosts appear to be dancing/moving unnaturally

**Reported bugs**

- Camera always faces forward, can't reverse
- Laggy and slow performance
- Anomalies disappear when tilting the camera

**Requested features**

- Ability to save/retrieve photos
- Improved accuracy in ghost detection
- Option to disable ads in paid version


## Frequently asked questions

### Is Electromagnetic Wave Measuring instrument free?

Electromagnetic Wave Measuring instrument is free to download, with no in-app purchases.

### Is Ghost SLS free?

Ghost SLS is free to download, with no in-app purchases.

### Which has better reviews, Electromagnetic Wave Measuring instrument or Ghost SLS?

Ghost SLS is rated higher. Electromagnetic Wave Measuring instrument averages 4.0 out of 5 from 1 ratings, while Ghost SLS averages 4.4 from 3.6K ratings.

### Do Electromagnetic Wave Measuring instrument or Ghost SLS have ads?

Ghost SLS shows ads; Electromagnetic Wave Measuring instrument does not.

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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.*