Casebook: Murder Mystery Logic

Find the lie, name the culprit

Free · In‑App Purchases

Every statement is true, and someone is still guilty. Read the testimony side by side, find the contradiction, and name the culprit. A new case arrives every day. Every statement is true. And someone is still guilty. Read the testimony side by side, find the contradiction, and name the culprit. In Case Arcs, five cases in each scene tell one story. HOW IT PLAYS - Nobody lies to you. The statements just don't point anywhere until you cross-reference them - "The Butler was not in the study." "The one who carried the candlestick was in the greenhouse." Mark the grid and rule things out - When the grid is done, one question remains: who is the culprit? - There is exactly one answer, and the app checks that for every case FEATURES Today's Case One case a day, built from the date. Everyone gets the same case. Fresh cases Cases are built on the spot, and recent ones are avoided. Four levels From a Minor Case (3x3) to a Cold Case (6x6). Three scenes The Snowed-In Lodge, The Night Express, The Hot-Spring Inn. Each has its own suspects, objects and rooms, and every case file gives a one-line history for each suspect. Case Arcs Five connected cases in each scene. Read what happened the night before, solve the case, and the next one opens. Hints that teach Instead of filling in the answer, a hint can point you to the two statements worth reading together. You can still open a single cell. Your casebook Every case you close is filed on a shelf with its seal. Detective rank Apprentice, Assistant, Detective, Inspector, Master Detective, Legend. Your stats also show how many times you have named each suspect. Tools of the trade Pencil marks and auto-elimination. WHO IT'S FOR - Readers who have finished every Christie and want to do the detecting - Sudoku players who would rather reason in words than in numbers - Anyone who wants five quiet minutes on the train or before bed - Anyone who likes a story that keeps going, one chapter at a time PRIVACY - No account and no sign-up - Cases are generated on your device, and your records stay there - No third-party advertising or analytics SDKs - The app may contact Apple's public API to show other apps by the same developer. Nothing about you is sent - No cloud sync (records do not move to a new phone)

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Now optimized for iPhone Duo and iPad. Minor improvements.

Version 1.3

The developer, torankirite, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

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    Information

    Seller
    torankirite
    Size
    1.9 MB
    Category
    Puzzle
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    Languages
    English and Japanese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026, Torankirite
  • Developer Website
  • Privacy Policy

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