# OminousnessGame vs Sinclair's Notebook

The clearest difference is ads: OminousnessGame at none against Sinclair's Notebook's shown. Sinclair's Notebook's advantage is review sentiment (100% vs 75%) and ratings volume (19 vs 1). On price, rating, update cadence 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.

On the App Store both sit at effectively the same score — 5.0 for OminousnessGame against 5.0 for Sinclair's Notebook. That said, the two scores are not equally well evidenced: Sinclair's Notebook has 19 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 75% of OminousnessGame's written reviews are positive against 100% of Sinclair's Notebook's.

OminousnessGame ships an update weekly, Sinclair's Notebook every 4 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OminousnessGame | Sinclair's Notebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/ominousnessgame/id6740749659/reviews) | [5.0 (19 ratings)](https://appshunter.io/ios/app/sinclairs-notebook/id6758689011/reviews) |
| Number of ratings | 1 | **19** |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Ad-supported | Ad-supported |
| Size | 238 MB | 481 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 9+ |
| Developer | [hyeyoung moon](https://appshunter.io/developer/1333483941) | [Puffything Games Inc.](https://appshunter.io/developer/1791042476) |

## What reviewers say

### OminousnessGame

[App page](https://appshunter.io/ios/app/ominousnessgame/id6740749659)

Explore surreal and unsettling artwork to uncover hidden details and solve mysteries. Tap to identify oddities, with a hint system available for assistance. This game challenges your observation and imagination.

**Highlights:** Eerie and bizarre illustrations, Identify strange details, Solve surreal mysteries, Tap to interact, Hint system available, Sparks imagination

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Sinclair's Notebook

[App page](https://appshunter.io/ios/app/sinclairs-notebook/id6758689011)

Embark on a literary mystery as Sinclair, seeking your friend Demian in a world consumed by chaos. Explore, gather clues in your notebook, and solve puzzles to uncover the truth behind the madness. This choice-driven narrative is inspired by Hermann Hesse's classic novel.

**Highlights:** Point-and-click gameplay, Visual novel narrative, Mystery thriller genre, Choice-driven story, Clue gathering and puzzle solving, Literary-inspired atmosphere

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OminousnessGame free?

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

### Is Sinclair's Notebook free?

Sinclair's Notebook is free to download, with no in-app purchases.

### Which has better reviews, OminousnessGame or Sinclair's Notebook?

OminousnessGame and Sinclair's Notebook are both rated 5.0 out of 5 on the App Store, from 1 and 19 ratings respectively.

### Do OminousnessGame or Sinclair's Notebook have ads?

Sinclair's Notebook shows ads; OminousnessGame does not.

### Which is updated more often, OminousnessGame or Sinclair's Notebook?

OminousnessGame ships an update weekly, and Sinclair's Notebook every 4 days. Most recently, OminousnessGame was updated on October 28, 2026 and Sinclair's Notebook 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.*