# Ghost SLS vs FOUR

The clearest difference is price: FOUR at Free against Ghost SLS's $0.99. FOUR also leads on ads (none vs shown) and review sentiment (53% vs 37%). Ghost SLS's advantage is rating (4.4 vs 3.9) and in-app purchases (none vs 1). On device support and iOS requirement there is nothing between them.

FOUR is free to download; Ghost SLS costs $0.99 up front. FOUR sells 1 one-off in-app purchase. Ghost SLS asks for nothing beyond the download.

Ghost SLS holds the better App Store score, 4.4 against 3.9. That said, the two scores are not equally well evidenced: Ghost SLS has 3.7K ratings behind it against 54, so its average is the more settled of the two. Written reviews complicate that: 37% of Ghost SLS's written reviews are positive against 53% of FOUR's, so the app with the better star average is not the one people write more warmly about.

Ghost SLS ships an update every 2 months, FOUR monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | Ghost SLS | FOUR |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.4 (3.7K ratings)](https://appshunter.io/ios/app/ghost-sls/id1504150811/reviews)** | [3.9 (54 ratings)](https://appshunter.io/ios/app/four-leaf4-leaf-clover-finder/id6450425954/reviews) |
| Number of ratings | **3.7K** | 54 |
| Positive reviews | 36.8% of reviews | **53.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 50 MB | 72 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [OurBigAdventure, LLC](https://appshunter.io/developer/562914290) | [Satoshi Ikebukuro](https://appshunter.io/developer/1693240120) |

## What reviewers say

### Ghost SLS

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

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


### FOUR

[App page](https://appshunter.io/ios/app/four-leaf4-leaf-clover-finder/id6450425954)

This app uses AI to help you find four-leaf clovers. It offers a 4K shot mode for wide areas and a real-time mode for closer views. Upgrade to Pro for unlimited access to all features.

**Highlights:** AI-powered clover detection, 4K shot mode for wide areas, Real-time detection mode, Pro mode for unlimited access, Supports iPhone 12 or later

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro mode | $1.99 | one-time |


## Frequently asked questions

### Is Ghost SLS free?

Ghost SLS costs $0.99, with no in-app purchases.

### Is FOUR free?

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

### Which has better reviews, Ghost SLS or FOUR?

Ghost SLS is rated higher. Ghost SLS averages 4.4 out of 5 from 3.7K ratings, while FOUR averages 3.9 from 54 ratings.

### Do Ghost SLS or FOUR have ads?

Ghost SLS shows ads; FOUR does not.

### Which is updated more often, Ghost SLS or FOUR?

Ghost SLS ships an update every 2 months, and FOUR monthly. Most recently, Ghost SLS was updated on November 3, 2026 and FOUR on November 3, 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.*