Stopko: Logic Grid Puzzles

Deduction, never guessing

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Stopko is a logic puzzle you finish by reasoning. You get a short story, a grid and a list of clues, and from those you can work out who has what. Without guessing once. Every one of the 400 puzzles was checked by the solver that built it. The solver proved two things: that exactly one answer fits, and that you can reach it by pure deduction. No clue is spare either — cover any one of them and the puzzle can no longer be solved. What is in Stopko: • 400 puzzles across five chapters, from three categories up to five • six themes with their own story: a café, allotments, a block of flats, a race, a library, a market • a hint that first names the clue which settles the next square, and only fills the square in if you press it again • automatic crosses, undo, and a higher contrast mode for reading the grid • English, Slovak and Czech The app contains no ads, needs no account, and works offline. The optional Night Observatory adds 60 new deduction puzzles with a one-time purchase. The original 400 puzzles and hints stay free.

Ratings & Reviews

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Larger grids, labels and clues make better use of tablet screens.

Version 1.0.4

The developer, Web 3.0 s.r.o., 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 Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Web 3.0 s.r.o.
    Size
    2.5 MB
    Category
    Puzzle
    Compatibility
    Requires iOS 15.0 or later.
    • iPhone
      Requires iOS 15.0 or later.
    • iPad
      Requires iPadOS 15.0 or later.
    • iPod touch
      Requires iOS 15.0 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.
    Languages
    English and 2 more
    • English, Czech, Slovak
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Web 3.0 s.r.o.
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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