シンプルで集中できる
一般的なマトリックスロジックパズルです。買い切りなのとスッキリしたUIが気に入ってます。１日１題の「今日の謎」の謎パターンが、同じ作者の同コンセプトのロジックパズルと完全に一致（人物や用語を入れ替えただけ）なのが、どちらも購入した者としては同じものを日に2回解くことになってしまいちょっと残念です。
Free
In-App Purchases
Details
About
Engage your logic skills with generated murder mystery cases. Cross-reference statements to find contradictions and identify the culprit. Offers multiple difficulty levels and themed scenarios without timers or luck-based gameplay.
✓Endless generated cases
✓Four case difficulty levels
✓Daily unique case
✓Three themed crime scenes
✓Detective rank progression
✓Pencil mode and hints
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What's New in Casebook
1.1
September 18, 2026
Your casebook is now a real shelf. ■ Casebook (new tab) Every case you close is filed away with its seal. Tap one to read how that night ended, all over again. ■ Hints that teach, not just tell The hint button can now point you at the two statements worth putting side by side. It won't give you the answer. You still find it. ■ Detective rank Apprentice to Master Detective. A seal is pressed at every promotion, and the Casebook tab shows how far the next one is. ■ Clean arrest Name the culprit without a single wrong guess and the file is marked. All of your existing records carry over.
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Subscriptions & In-App Purchases
$4.99
Premium
Unlock every level and scene. No daily limits.
User reviews
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FAQ
Does Casebook have ads?
No, Casebook is ad-free. The developer states there are no third-party advertising SDKs or behavioral tracking.
How many cases are available in Casebook?
Casebook offers endless cases, as each case is generated fresh and verified to have a unique solution before being presented to the player.
What are the difficulty levels in Casebook?
Casebook features four case levels, ranging from a Minor Case (3x3 grid) up to a Cold Case (6x6 grid), providing a progressive challenge.
Can I play Casebook offline?
Yes, cases are generated on your device, and your records stay on your device, indicating offline play is supported. There is no cloud sync.
Is Casebook suitable for children?
Casebook has an age rating of 4+, making it suitable for younger players. The gameplay focuses on logic and deduction.
How often is Casebook updated?
The app was last updated on September 18, 2026, indicating regular updates are provided by the developer.
What makes Casebook different from other mystery games?
Casebook emphasizes pure logic and deduction, without timers, luck, or tapping speed. It focuses on cross-referencing true statements to find contradictions.
Does Casebook offer hints?
Yes, Casebook includes a single-cell hint feature for when a case truly stalls, along with a pencil mode for tentative marks and auto-elimination.
