Casebook vs Induction

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. ◆ Free to start. No subscription (one-time purchase) ◆ No third-party ads ◆ Your records stay on your device HOW IT PLAYS - Nobody lies to you. The statements just don't point anywhere until you cross-reference them - Three kinds of clues: testimony from witnesses, alibis that say where someone was, and scene evidence left behind by the objects themselves - "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 Your first case The first time you open the app, you solve a small case together, one step at a time. You can skip it at any time. 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). Four scenes The Snowed-In Lodge, The Night Express, The Hot-Spring Inn, The Old Manor. 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

Somewhere inside the box, lodestones are hiding. You can't see them. You can only fire probes into the machine and watch what comes out. A beam that flies straight through? Nothing in its path. A beam that never comes out? A direct hit. A beam that exits somewhere unexpected? Now you're getting somewhere. Every deflection is a clue! Induction is a pure logic deduction game in the tradition of the classic Black Box puzzle: a hidden grid, a limited set of probes, and everything solvable by reasoning alone. No luck, no timers, no move-matching. If you love Minesweeper, nonograms, or picross-style deduction, this is that same "aha!" — with beams. HOW IT PLAYS • Fire probes into the edges of a hidden grid • Read the results: hits, deflections, reflections, pass-throughs • Mark your deductions in the grid until you're certain • Seal your answer. Clean solves and streaks are tracked. WHAT'S INSIDE • Over 1,000 hand-tuned puzzles across notebook collections, from gentle on-ramp to expert codex • A new Daily Challenge every day. The same puzzle for everyone, and streaks to keep • A tutorial that teaches by demonstration, not walls of text • Beautiful vintage-laboratory notebook style PLAYS ANYWHERE • Fully playable offline (commutes, flights, dead zones) • No account required. Sign in with Google or Apple only if you want your progress backed up or synced across devices • Progress backup and cloud sync when signed in FAIR & FOCUSED • Free, supported by ads; rewarded ads are always your choice • No pay-to-win, no energy systems, no consumable nonsense • Your brain is the only power-up From Connexus Digital, the makers of Connexus Puzzles. Charge the coils. Fire the probe. Find what's hiding.