OminousnessGame vs Sinclair's Notebook
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
OminousnessGame
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.
- Eerie and bizarre illustrations
- Identify strange details
- Solve surreal mysteries
- Tap to interact
- Hint system available
- Sparks imagination
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The game begins with an eerie and bizarre illustration. Players take on the role of finding strange or unusual details hidden within the artwork. The illustration contains surreal or unsettling truths, some of which might be simple mistakes, while others are deliberate mysteries waiting to be uncovered. Players can click or tap on the screen to identify the oddities. "Ominousness Mystery Game" goes beyond mere observation, sparking imagination and heightening tension. Find the strange and unsettling details in the ominous artwork to solve the mystery! If players struggle to find the answer, a hint system is available to make it easier to uncover the strange elements.
Sinclair's Notebook
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.
- Point-and-click gameplay
- Visual novel narrative
- Mystery thriller genre
- Choice-driven story
- Clue gathering and puzzle solving
- Literary-inspired atmosphere
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A literary mystery game where you become Sinclair. Sinclair and Demian are irreplaceable friends who understand each other like no one else. On the day Sinclair dreams of receiving Demian’s notebook, ominous dark clouds cover the sky, and people suddenly become impulsive and violent, their eyes stained a maddening red. In an instant, the world descends into complete chaos. Sinclair opens the strange notebook Demian once gave him. From within it, a glowing blue bird bursts forth and flies toward Demian’s house. Carrying only the notebook, Sinclair follows the blue bird—the beacon of light Demian left behind—and sets out on a perilous journey. About the Game Sinclair’s Notebook is a point-and-click mystery thriller visual novel that reinterprets Demian, Hermann Hesse’s coming-of-age classic. One day, the world of evil—filled with blood, darkness, and immorality—emerges with ominous storm clouds and begins to consume even the world of good. In this crisis, Demian, Sinclair’s one true confidant, has vanished. Your goal is to follow the beacon of light, find him, and uncover the truth behind what has happened. Set against the literary atmosphere of the 1910s, the game delivers poetic emotion and delicate portrayals of the inner self inspired by the original novel. Whether you have read Demian or not, you can enjoy the story through an immersive choice-driven narrative. Choose Sinclair’s words and actions yourself, and draw closer to the truth. Gameplay Ordinary life is gone. Explore the map to uncover clues that will lead you to Demian and gather the evidence needed to support them, recording everything in your notebook. Once you have collected enough clues and evidence, you must combine what you have gathered in the notebook and solve the situation at hand. In a world brought to a standstill, Sinclair is not simply trying to identify a criminal and bring them to justice. He must save those consumed by madness, resolve conflicts among the people entangled in each case, and investigate situations that defy all understanding. The game also features puzzles that are approachable even for players who are new to mystery games. Characters Meet a wide range of characters from the original novel, each reimagined with deeper stories and new narrative layers. Sinclair’s Notebook also features charming original characters who appear only in this game. [Sinclair] A growing boy who endlessly seeks to understand himself and the world [Demian] A mysterious friend who seems to see through everything in the world [Eden] A mystical blue bird made of light [Frau Eva] Demian’s mother, a prophet who can wield magic [Father Martin] A priest who knows an important truth about the past of the church on the outskirts Many more characters will join Sinclair’s journey throughout each chapter. Recommended For -Players who love classic literature -Players looking for story-driven games, visual novels, or mystery games -Players who enjoy dark fantasy that is intense yet meaningful -Players who love mystery adventures -Players who enjoy stories that are dark and lyrical, yet ultimately search for the light Players who want a game with a clear beginning, climax, and ending Players who enjoy a classic atmosphere Players who love escape-room style games
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | OminousnessGame | Sinclair's Notebook |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (19 ratings) |
| Positive reviews | 75.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 19 — better |
| Update frequency | Weekly | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 238 MB | 481 MB |
| Age rating | 12+ | 9+ |
| Developer | hyeyoung moon | Puffything Games Inc. |
Customer experience
OminousnessGame
Sinclair's Notebook
In-app purchases
OminousnessGame
No in-app purchases
Sinclair's Notebook
No in-app purchases
Questions
Is OminousnessGame free?
Is Sinclair's Notebook free?
Which has better reviews, OminousnessGame or Sinclair's Notebook?
Do OminousnessGame or Sinclair's Notebook have ads?
Which is updated more often, OminousnessGame or Sinclair's Notebook?
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