SumGrid
Sudoku
The classic 9×9. Fill every row, column and box with 1 to 9, using notes, hints and auto-notes when you want them.
Four puzzles · one calm app
Sudoku, Kakuro and sum puzzles, all in one place.
SumGrid brings together four classic number puzzles with a soft, easy-on-the-eyes design. Thousands of levels, every one checked to have exactly one solution, plus a new daily set every day.
Free with ads. Works on any computer, no download needed. Android app in testing now.
Four games, one tidy home
Pick the puzzle that suits your mood. Each has 1000 levels from gentle to fiendish, plus free play with a difficulty slider.
Number Sums
Keep or erase digits so every row, column and coloured region adds up to its target. Quick and surprisingly deep.
Sum Sudoku
Killer sudoku: Sudoku rules plus dashed cages whose digits must add up to the small total in the corner.
Kakuro
A crossword made of numbers. Each run of white cells must add up to its clue, without repeating a digit.
Made for long, relaxed sessions
Designed with late-night players in mind: big digits, soft colours and no clutter.
A daily set
One puzzle of each kind every day, the same for everyone. Finish them to grow your streak.
Exactly one solution
All 4000 levels were checked by computer to have one unique answer, so logic always wins and you never need to guess.
Easy on the eyes
Soft pastel glass design, large numbers, auto-pause when you step away and an optional eye-rest reminder.
Notes, hints and undo
Pencil marks, auto-notes, three hints per puzzle and unlimited undo. Turn the mistake check on or off.
Stats and streaks
Best times, levels completed and your daily streak, all saved automatically.
Phone or computer
Play on Android, or right here in your browser on Windows, Mac or Linux. Move your progress with a backup code.
Ready for a puzzle?
Start playing in your browser now. No sign-up and nothing to install.