Calcudoku
A Latin square with sums
No givens at all — the arithmetic in the cages is the only clue there is. No ads, no timers, fully offline.
Get it
| App | Version | Price | Status | Where |
|---|---|---|---|---|
| Calcudoku | v1.0.0 | Free | In progress | not submitted yet |
About
A grid carved into cages, each labelled with a target and an operator its digits have to produce. 11+ over three cells. 2÷ over two. A bare 5 on its own.
Fill the grid so no digit repeats in a row or column and every cage pays its label. Nothing starts filled in — the arithmetic is the only clue there is.
Every Board Has One Answer
Boards are generated on your phone and then solved with nothing but forced deductions before you see them. A board the solver finishes has exactly one answer, so there is never a point where the only way forward is to try something.
Six Deductions, Each With A Name
A one-cell cage is its own digit. 5+ in a 4×4 is 1 and 4 or 2 and 3, and nothing else. A cage that sits inside one row must hold a digit that the rest of the row then cannot. Hints explain the step rather than filling it in — writing the digit is a second tap.
Difficulty That Counts Both Things
Size and reasoning. A 6×6 that falls to simple moves is still six digits a row, and a 4×4 that needs real cage counting is a hard board on a small grid. The tier takes the harder of the two.
How It Plays
• Three sizes: 4×4, 5×5 and 6×6, all open from the first launch • Pencil marks, with an optional fill of everything the row and column still allow • The board highlights repeats in a line, and mistakes if you want it to • Unlimited undo
What It Doesn't Do
No ads. No lives. No energy meter. No waiting. No streak that punishes a missed day. No account. No analytics. No network requests of any kind — the app has no networking code in it at all, and that is checked automatically every time it is built.
Everything happens on your phone. Play it on a plane.
Store artwork
Release status
Calcudoku — 5/8
| Step | State | |
|---|---|---|
| ✅ | Listing copy | written |
| ⬜️ | Support & privacy pages | not published yet |
| ✅ | Privacy answers | answered |
| ✅ | Artwork | icon and splash drawn |
| ✅ | Store art | generated |
| ⬜️ | Screenshots | none captured yet |
| ⬜️ | Framed shots | none captioned yet |
| ✅ | Version | 1.0.0 |
Privacy
This game collects nothing. Read the policy — every category, answered.