Oldemaat-Games · Android
Number Puzzles
Five number logic puzzles in one app: Sudoku, Binary, Futoshiki, Mathdoku and Kakuro. Every puzzle is generated on your phone, has exactly one solution and never needs a guess. No account, no ads, no network access.
The games
Five puzzles, four difficulty levels each
From a relaxed Easy to an Expert that needs real technique. Pick a game, a size and a level, and a fresh puzzle is ready in a moment.
Sudoku
The classic 9×9, with pencil marks, undo, hints, and highlighting for rows, columns, boxes and matching digits.
Binary
also known as Takuzu or Binairo
Fill the grid with zeros and ones. Never three the same in a row, equal counts per line, and no two identical rows or columns. 6×6 up to 12×12.
Futoshiki
Each digit once per row and column, with < and > signs between some neighbours. 4×4 up to 7×7.
Mathdoku
the puzzle also sold as KenKen and Calcudoku
A Latin square split into cages. The digits in each cage must reach its target with its operation: + − × ÷. 4×4 up to 7×7.
Kakuro
A crossword with sums. Digits 1–9 in the white cells, every run adds up to its clue, and no repeats within a run.
A daily puzzle for each
One puzzle per game per day, the same for everyone that day. It starts Easy on Monday and climbs to Expert on Sunday.
Why Number Puzzles
Made for people who like their logic clean
Difficulty you can trust
Levels are set by the reasoning a puzzle needs, not just by how many digits are given. Expert Sudoku really needs an X-wing or a swordfish.
Exactly one solution, no guessing
Every puzzle is checked by a logical solver before you see it. You can always reason your way to the end.
Pick up where you left off
Your game is saved after every move. Close the app and continue later, even after a restart.
Statistics, streaks and achievements
Best and average times per game, size and level, a daily streak, and 17 achievements to collect.
Helpful when you want it
Rule violations are marked as you play, and you can turn that off for a purer challenge. Hints and pencil marks are there when you need them.
No account, no ads, no internet
The app has no network access at all. Everything is generated and stored on your phone.