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.

ON PHONES AND TABLETS
• Built for both — a bottom bar on phones, a side rail and split view on tablets
• Turn it any way round; the board follows
• A dark theme that follows your device, with the meadows redrawn for night
• Honours your system animation setting, and the text grows with your display-size setting

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:
School is now a 20-lesson course with 100 activities — a worked example, then guided practice, then puzzles of your own.

New Jigsaw journey: 122 levels with irregular shapes instead of boxes. 21 badges to earn along the way.

A dark theme follows your device — the meadows turn to night too. Mistakes, matching numbers and tutorial hints now look different from one another, not just differently coloured. Bigger text is handled throughout.

Still no ads, still fully offline.