# Secret Passages Hidden Objects vs Serum X

The clearest difference is rating: Serum X at 1.6 against Secret Passages Hidden Objects's 1.0. Serum X also leads on update cadence (every 4 months vs every 130 months) and monetization model (free vs free with in-app purchases). On price, review sentiment, ads 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.

Serum X holds the better App Store score, 1.6 against 1.0. That said, the two scores are not equally well evidenced: Serum X has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

Secret Passages Hidden Objects ships an update every 130 months, Serum X every 4 months. The most recent releases landed on November 1, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Secret Passages Hidden Objects | Serum X |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/secret-passages-hidden-objects/id1031464194/reviews) | **[1.6 (5 ratings)](https://appshunter.io/ios/app/serum-x/id1275596958/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 130 months | **Every 4 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 165 MB | 99 MB |
| Requires iOS | 15.0 | **10.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Apollo Kashi](https://appshunter.io/developer/1817339768) | [Jose Lopez](https://appshunter.io/developer/373679428) |

## What reviewers say

### Secret Passages Hidden Objects

[App page](https://appshunter.io/ios/app/secret-passages-hidden-objects/id1031464194)

Explore beautifully crafted environments and search for cleverly hidden items in this immersive hidden object game. Enjoy a smooth, satisfying gameplay experience with dynamic animations and unique themes across multiple levels.

**Highlights:** Immersive hidden object gameplay, Beautifully designed levels, Unique themes and environments, Dynamic object animations, Relaxing yet engaging experience, Clean and intuitive UI

**Features:** macOS Compatibility

**In-app purchases:** none


### Serum X

[App page](https://appshunter.io/ios/app/serum-x/id1275596958)

Uncover a revolutionary serum before it's misused. Employ detective skills in this point-and-click adventure to locate its hidden storage. Navigate a world of scientific progress and industrial change to secure the future.

**Highlights:** Detective gameplay, Point-and-click mechanics, Room escape puzzles, Story-driven adventure, Scientific advancements theme

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Secret Passages Hidden Objects free?

Secret Passages Hidden Objects is free to download, with no in-app purchases.

### Is Serum X free?

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

### Which has better reviews, Secret Passages Hidden Objects or Serum X?

Serum X is rated higher. Secret Passages Hidden Objects averages 1.0 out of 5 from 1 ratings, while Serum X averages 1.6 from 5 ratings.

### Do Secret Passages Hidden Objects or Serum X have ads?

Neither Secret Passages Hidden Objects nor Serum X shows ads.

### Which is updated more often, Secret Passages Hidden Objects or Serum X?

Secret Passages Hidden Objects ships an update every 130 months, and Serum X every 4 months. Most recently, Secret Passages Hidden Objects was updated on November 1, 2026 and Serum X on October 10, 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.*