MASYU: Loop Logic Puzzle
One loop, one answer. Daily.
Only for iPhone
Free · In‑App Purchases
iPhone
Two rules, endless calm. White goes straight, black turns—link every pearl into one loop. Always exactly one solution. No numbers, no noise. A quiet daily puzzle.
One line. A clear mind.
MASYU is a quiet logic puzzle: link every pearl on the board into a single loop that never crosses or branches. No numbers, no math—just two simple rules and your finger.
Two rules, real depth
- White circle ○: the line passes straight through, and must turn in the cell just before or after it.
- Black circle ●: the line turns on the circle, and goes straight through the cells on both sides.
From these two rules, surprisingly deep boards emerge.
Features
◆ Four difficulties (Easy / Medium / Hard / Expert)
◆ A fresh Daily Puzzle — the same board for everyone, every day
◆ Every puzzle is uniquely solvable, verified by a real solver—no guessing required
◆ Fully offline, no account, no sign-up
◆ A gentle hint for when you're truly stuck
◆ Records & streaks: solves, best times, no-hint rate, daily streak
◆ Calm, paper-and-ink design in indigo and vermilion
Great for you if
- You've solved enough Sudoku and want a new kind of logic puzzle
- You want to reset your mind during a commute or a short break
- You're tired of ads and notifications and crave quiet focus
- You like building a small daily brain-training habit
- You enjoy Nikoli-style pencil puzzles (loop / one-stroke)
Privacy
- No account required.
- Your records stay on your device—nothing is sent to any server.
- Works fully offline.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
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 .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- torankirite
- Size
- 3.7 MB
- Category
- Puzzle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Premium $4.99
- Copyright
- © 2026, Torankirite