Sudoku Junior: Learn to Solve

A sudoku that teaches your child how to think it through — not one that just checks answers.

Sudoku Junior explains its own reasoning. When your child is stuck, the board dims to the row, column or shape that decides the square, and the app says why in plain words: everything else here is already used, so only one number fits. It never gives away both the square and the number — your child still takes the last step.

SUDOKU SCHOOL
A short section that teaches the real solving tricks by name, one at a time — where sudoku came from, then a lesson each for the last one in a square, the only place left in a row, and the locked pair. Watch the deduction, then finish it yourself. Nothing here can be failed.

FOUR SIZES AND A DIFFERENT KIND OF PUZZLE
• 4×4 — a child's first sudoku
• 6×6 — the next step
• 9×9 — the classic
• 12×12 — for confident solvers
• Jigsaw — 122 levels from 4×4 to 7×7 where wiggly puzzle pieces replace the boxes

Every puzzle is machine-checked to have exactly one solution, by two independent solvers.

FOR CHILDREN WHO CAN'T READ NUMERALS YET
Switch the board to countable dots — dice faces a four-year-old already recognises. The same real sudoku, counted instead of read.

ONE TABLET, SEVERAL CHILDREN
Up to four children, each with their own progress. A grown-up adds them; a child can switch without asking.

A REPORT FOR GROWN-UPS
Puzzles solved, how long they spent thinking, where they needed a hand, and which tricks they have learned. No score, no comparison between children. Worked out on the device — none of it is sent anywhere.

MADE FOR PARENTS TOO
• No ads. Ever.
• Fully offline
• No timers, no fail states, nothing to lose
• A parental gate protects purchases, settings and links
• No account, no sign-up, no data about your child
• One family purchase unlocks everything

A sudoku your child can grow with, and that you can trust.

Recent changes:
The biggest update yet.

• Hints now explain the why — the board shows the reasoning, your child takes the last step
• Sudoku School: five short illustrated lessons, from real sudoku history to named solving tricks
• New: Jigsaw Sudoku — a 122-level journey where wiggly pieces replace the boxes
• 21 badges to earn, and a simple tab bar to find everything
• Up to four children with avatars and their own progress, plus a parent report
• Dots mode for pre-readers, gentle vibration, a fresh look