Who Did It? Elimination Puzzle
The register of suspects
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
A case file, a register of suspects and a marker. Strike out everyone the evidence rules out. New: Ten Thousand Followers, a case of ten thousand handles.
A case file lands on your desk: one register of suspect names, and a handful of
exhibits from the chief inspector.
Read an exhibit. Strike out every name it cannot be. Tap a single name, or put your
finger down and sweep the marker through a whole run of them. The register thins,
the counter falls, and when one name is left standing you write it on the accusation
and set the seal.
No timers. No lives. No hints elbowing their way in. Just the evidence, your marker
and the patience to work it through.
THE DESK
• Hand drawn paper, ink and a marker that leaves a real stroke
• Evidence that never mentions pages, columns or first letters, so the puzzle stays honest
• A practice file that teaches the craft in about three minutes
• English, Dutch, German and French, following your device
• Day and high contrast desks, four text sizes, spoken labels throughout
• Your case ledger: time on the case, names struck, names restored, false accusations
THE PEN
A free pen holds 500 strikes. Take a strike back and its ink returns; the practice
file never costs any. When the pen does run dry it fills again by itself a quarter
of an hour later, and you are welcome to close the file while it does. Or watch a short
advertisement, or take the fountain pen for good.
PREMIUM DETECTIVE
One purchase, yours to keep. The fountain pen never runs dry and the advertisement never
comes. Seventeen marker colours instead of five, with a colour tied to every
exhibit so you can see at a glance why a name fell. The night desk, with rain, a
fireplace or a ticking clock. And when the case closes, the full dossier of every
sitting and an ornate CASE CLOSED certificate to keep.
Every case has exactly one solution, proven before it ever reaches you.
Ratings & Reviews
New in this version
• Season II: The Cold Case. Four new files, one a week. A fire in 1958, a payroll that survived it, and a name that turns up on a parking ticket last week. Each file opens on Friday evening; the desk counts down to it.
• New kinds of register: a payroll with the day every key was issued, a car park log with the make beside every plate, a brewery's ledger of six and a half thousand pubs with a map of the county, and a marriage register of fifteen thousand couples, where every slip says which of the two names it is about.
• Season II is included in Premium Detective.
• If you allowed reminders, the inspector leaves one the hour a file opens.
The developer, Dylan Mattijssen, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Dylan Mattijssen
- Size
- 124.9 MB
- Category
- Puzzle
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Premium Detective $3.99
- Copyright
- © 2026 Dylan Mattijssen
