Endoku

Concentric number logic puzzle

Only for iPhone

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

iPhone

A brand-new kind of puzzle. Place 1–9 on concentric rings so each radial line adds to the same total. No annoying ads, no data collection. Endoku is a single-player logic puzzle played on concentric rings, where you place numbers so each radial line adds up. Just two rules: • Each ring uses its set of numbers exactly once. • The cells along each radial line must add up to the same target. From these two simple rules, pure logic — never guessing — leads you to the one solution. Every puzzle is generated to be solvable by logic alone. Fresh for anyone who bounced off Sudoku, and meaty enough for anyone a little bored of it. Features: • Four board modes: Intro (2 rings) / Basic (3) / Advanced (4) / Expert (5) • Three difficulties (Easy / Medium / Hard) • Pencil marks (candidate notes) to work through the tougher boards • A fresh Daily puzzle with a calendar and streaks • A built-in strategy guide • Calm music and satisfying sound effects (each toggleable) • Gentle haptics • A calm, easy-on-the-eyes board • Japanese / English, portrait & landscape Intro and Basic (Easy/Medium) are free. A single one-time purchase unlocks all modes and difficulties, daily puzzles, the strategy guide, and music & sound.

Ratings & Reviews

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• Continue: unfinished puzzles now resume right where you left off • Difficulty tuning: "Hard" is genuinely harder in every mode • Puzzles solved with hints no longer count toward best times, and a new "No-hint solves" stat tracks the rest • Lines whose sum can no longer work are flagged in red as you type • Bug fixes and small refinements

Version 1.4.0

The developer, seiji honda, 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
    seiji honda
    Size
    3.4 MB
    Category
    Puzzle
    Compatibility
    Requires iOS 16.0 or later.
    • iPhone
      Requires iOS 16.0 or later.
    • Mac
      Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    Japanese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © Seiji Honda
  • Privacy Policy

    • More by seiji honda

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