Suguru: Number Logic Puzzle

Fill each little room with numbers, starting from 1. The same number can never touch — not across, not up and down, not even diagonally. Every puzzle solves by logic alone, and when you're stuck, the hint shows you why. Free to start, no subscription No third-party ads Your records stay on your device Suguru (also known as Tectonic) is a number logic puzzle played on a grid split into rooms. A room of size n holds the numbers 1 through n, once each, and no two matching numbers may sit in neighbouring cells — diagonals included. That one twist gives it a feel all its own, quite different from sudoku. Every puzzle is built to be solvable by deduction. You never have to place a number on a hunch and watch the board fall apart. Just the quiet satisfaction of pinning down one certain cell at a time. ■ Features A logic rule unlike sudoku: no matching neighbours, diagonals included Every puzzle solvable by deduction — no guessing Four sizes: 5×5, 6×6, 7×7, 8×8 (Hard and Expert call for deeper techniques) Hints that explain: the hint highlights the cells that prove the next number and tells you why. If a number on the board is wrong, it points that out first Continue: leave mid-puzzle and pick up on the same board next time A fresh Daily puzzle with a solving streak 19 achievements and personal-best records Pencil marks, erase and undo A calm design in traditional Japanese colours, with dark mode English and Japanese No account needed ■ Great for you if… You know sudoku well and want a fresh next puzzle You'd rather deduce than guess You want to understand the "why" when you're stuck You like a quiet way to use your mind on a commute or before bed You're building a small daily habit ■ Privacy Your records stay on your device and are never sent anywhere. No account, no sign-in. Puzzles are generated on the device, so you can play without a connection. To introduce the developer's other apps, Suguru may fetch public App Store information (app names and icons); none of your data is sent.