Free for teaching
A real free range. More when you want it.
Complete the dossier of teaching proposals’s activities for free. Try advanced options in demo mode; the full version removes filling limits.
Free for the classroom, full for those who take to it
A game without ads and without data collection still has to be paid for — and the two usual ways of doing so are exactly the ones it refuses. The model is simple: the free version is calibrated to be enough for teaching; those who take to it buy the full version, €2 a year or €10 for life. The web version follows the same range as the free one, and receives the licence through a QR code.
InZeDoku on Android through Google Play, on Windows through the Microsoft Store, and in your browser.
- Every mode, every geometry, every size, every level opens and plays
- Calibrated to be enough for the classroom: everything the dossier of teaching proposals describes plays and finishes here
- Grids within the free range can be finished: Sudoku up to 9×9, Calcudoku up to 5×5 — fractions and decimals included
- Game codes coming from the full version open too
- The light bulb, the pencil, codes, QR, printing
- Beyond a certain point of size, complexity or geometry, a grid cannot be finished: it is a demonstration — announced three times, never a surprise
- No limits: Hard and Expert levels, mosaic, Mystery Calcudoku, large squares up to 26×26
- Every combination of operations, every value from −99 to 99
- When printing: the solving list and the player's path
- A game started in the demonstration finishes here: pass it on by QR or paste it in, it resumes exactly where it was
- The licence also moves to the web version, through a QR code from the phone — one browser at a time
- No ads, no data collection, no account to create — just like the free one
- The same range as the free Android version: everything opens, grids within the range can be finished, beyond that it is a demonstration
- With the full version on your phone, transfer it the licence through a QR code: it becomes full
- The comfort of large squares: a 20×20 on a big screen, with mouse and keyboard
- The same grids as Android for the same code — measured grid by grid
- A game moves from the phone to the computer and back: by QR or by copy-and-paste of the code, both ways
- The page freezes while a grid is being built, and games stay in that browser
The free range
Within its range, the free version finishes everything. Beyond it, it is a demonstration: everything opens and plays, but a grid only fills up to the share shown, and the keyboard places nothing more.
| Board and mode | Free up to | Beyond |
|---|---|---|
| Square · Sudoku | 9×9 | 25% |
| Square · Calcudoku | 5×5 | 25% |
| Square · Colodoku | 4×4 | 35% |
| Square · Pictoku, Geodoku… | 5×5 | 50% |
| Square · science sets | 5×5 | 30% |
| Hexagonal | radius 2 | 35% |
| Triangular | side 6 | 35% |
| Voronoi | 5 symbols | 35% |
| Mosaic | — | 25% |
Outside the free range whatever the size (25%)
- the Hard and Expert levels
- the mosaic geometry
- Mystery Calcudoku
- mixed operations outside +, + −, + − × and + − × : — a single operation on its own stays free
- values outside 1 to 10 — “multiplication tables, that's all”
When several reasons apply, the lowest share wins. Nothing is forbidden: only placing a value is refused past the wall — erasing, correcting, undoing, the pencil, the preview, the timer and the code keep working.