# Ghost face detector vs Alchemy

The clearest difference is review sentiment: Ghost face detector at 100% against Alchemy's 7%. Ghost face detector also leads on iOS requirement (13.0 vs 15.0). Alchemy's advantage is update cadence (every 11 days vs every 17 months) and ratings volume (978 vs 15). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Alchemy holds the better App Store score, 4.3 against 4.0. That said, the two scores are not equally well evidenced: Alchemy has 978 ratings behind it against 15, so its average is the more settled of the two. Written reviews complicate that: 100% of Ghost face detector's written reviews are positive against 7% of Alchemy's, so the app with the better star average is not the one people write more warmly about.

Ghost face detector ships an update every 17 months, Alchemy every 11 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Ghost face detector | Alchemy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (15 ratings)](https://appshunter.io/ios/app/ghost-face-detector/id6447429367/reviews) | **[4.3 (978 ratings)](https://appshunter.io/ios/app/alchemy-ai-merge/id6475807654/reviews)** |
| Number of ratings | 15 | **978** |
| Positive reviews | **100.0% of reviews** | 7.1% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 17 months | **Every 11 days** |
| Monetization | Ad-supported | Ad-supported |
| Size | 166 MB | 232 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Mikhail Frenkel](https://appshunter.io/developer/665984308) | [INHYUK CHOI](https://appshunter.io/developer/1629372780) |

## What reviewers say

### Ghost face detector

[App page](https://appshunter.io/ios/app/ghost-face-detector/id6447429367)

This app uses face tracking algorithms to detect and analyze potential 'ghost faces' in photos and videos. It allows users to record or import media, then search for these spectral outlines, and share findings with friends. It's presented as a fun, experimental tool rather than a scientific one.

**Highlights:** Face tracking during camera operation, Switch between front and selfie cameras, Record video with or without contour overlay, Take photos with or without contour overlay, Analyze captured or imported videos/photos for ghost faces, Share findings with friends, Receive and analyze media from friends

**Features:** macOS Compatibility

**In-app purchases:** none


### Alchemy

[App page](https://appshunter.io/ios/app/alchemy-ai-merge/id6475807654)

Combine basic elements like Fire and Water to craft new materials and build an entire world. This interactive game is easy to learn but offers a creative challenge for all ages. Explore and shape your own unique world.

**Highlights:** Combine basic elements, Craft new materials, Build a world piece by piece, Interactive gameplay, Unleash creativity, Learn and explore

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Somewhat interesting to create things
- 💡 Potential for a fun concept

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 💩 Misleading advertising
- 📺 Excessive and intrusive ads
- 🤔 Unclear gameplay mechanics
- 🤷‍♀️ Lack of expected features (people, scissors, handcuffs, etc.)

**Reported bugs**

- Tutorial gets stuck and closes the game
- Inability to progress past tutorial
- Merging elements doesn't work as expected

**Requested features**

- Add more interactive elements like people, scissors, handcuffs, etc.
- Improve gameplay and reduce reliance on ads
- Fix tutorial and onboarding issues


## Frequently asked questions

### Is Ghost face detector free?

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

### Is Alchemy free?

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

### Which has better reviews, Ghost face detector or Alchemy?

Alchemy is rated higher. Ghost face detector averages 4.0 out of 5 from 15 ratings, while Alchemy averages 4.3 from 978 ratings.

### Do Ghost face detector or Alchemy have ads?

Both Ghost face detector and Alchemy show ads.

### Which is updated more often, Ghost face detector or Alchemy?

Ghost face detector ships an update every 17 months, and Alchemy every 11 days. Most recently, Ghost face detector was updated on October 24, 2026 and Alchemy on October 24, 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.*