01
651 levels, gently rising
9 galaxies, 12 star systems, 93 planets. Level by level, the difficulty grows with you.
Sudoku Planet
A calm space
Sudoku for all ages
651 hand-tuned levels across 9 galaxies and 93 planets, from tiny 4×4 grids all the way up to 16×16 — one step at a time, from a 5-year-old's first grid to one that makes a grown-up stop and think.
- No ads
- No in-app purchases
- No sign-up
- Fully offline
Try a puzzle
The phone below runs the complete game — just tap inside the frame and play. The first load takes a second or two, then it's smooth.
Playable right here
The frame holds the complete, playable game: tap cells, fill in numbers, use hints — just like on a phone.
- Web version — opens instantly, nothing to install
- Progress is saved in your own browser and never uploaded
What this is
Not an adult Sudoku shrunk down — designed from scratch, from age 5 upwards.
02
Nine grid sizes, 4×4 to 16×16
Pick by ability, not by age. Start with 4×4 and move up once it feels easy.
03
Hints you earn
Hints aren't free — answer a quick question to earn a clue. Kids never get truly stuck, and never lean on hints.
04
A daily puzzle
One puzzle a day — a few minutes of ritual that turns "let's play" into a habit.
05
Printable
Print A4 sheets and keep playing away from the screen.
06
Clean, offline, made for small hands
No ads, no in-app purchases, no internet; progress stays on the device. Big tap targets, clear numbers, gentle sounds.
Download
Playable in the browser right now; the mobile version is being prepared.
The Android build is packaged and in Google Play review; iOS is still in development. Once live, this will become a direct download link.