Suguru Sensei
Tectonic & Kemaru logic puzzle
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Suguru — also known as Tectonic or Kemaru — is a logic puzzle of pure deduction. Fill every region with the numbers 1 to its size. Two equal numbers may never touch, not even diagonally. That's all the rules there are.
ENDLESS PUZZLES, MADE ON YOUR PHONE
Every puzzle is generated on your phone, so you never run out. Seven sizes from 5×5 to 12×12, four difficulties from Easy to Expert.
EVERY PUZZLE HAS ONE SOLUTION — AND YOU NEVER HAVE TO GUESS
Each puzzle is checked by a solver before you see it: one solution, reachable by logic alone. Difficulty is set by which techniques the puzzle needs, not by how many numbers are missing.
HINTS THAT TEACH
Stuck? A hint shows you where to look first. Ask again for the name of the technique, then why it works — and only at the end the number itself. Take as much help as you want, and no more.
• Cell hint: what can be worked out about the cell you have chosen.
• Check: compares your numbers with the solution and rings the wrong ones.
A DAILY PUZZLE
The same puzzle for everyone each day, rising from gentle on Monday to a proper challenge on Sunday. Keep your streak going.
MADE TO BE PLAYED
• Numbers and pencil marks on one keypad — no mode to switch.
• Select several cells at once and pencil a mark into all of them.
• Pencil marks in fixed positions, like the five on a die.
• Unlimited undo and redo.
• Your unfinished puzzles are saved; pick up where you left off.
• Statistics for every size and difficulty.
• Colour themes, including high contrast and colour-blind-friendly region colours.
• Danish and English.
NO ADS. NO ACCOUNT. NO DATA COLLECTED.
Everything stays on your phone. The app never connects to the internet.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Hints now skip the deductions your pencil marks show you have already made. New Copy and Paste buttons move pencil marks from one cell to others.
The developer, Morten Ovi, 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
- Morten Ovi
- Size
- 37 MB
- Category
- Puzzle
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 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+
- Copyright
- © 2026 Morten Ovi