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Tessera is Sudoku, Killer Sudoku and Nonogram in one Android app. Every board has exactly one solution, and that is proved rather than assumed.
A tier is named after the hardest technique a puzzle actually needs — not by how long a solver took to give up. If a board says Expert, it genuinely requires swordfish or quads.
Coming soon to Google Play.
One app, five tiers each, all generated on your phone.
Pencil marks, unlimited undo, and hints that name the technique they used.
No given digits at all, as the genre intends. The cages are the whole puzzle.
Drag to paint a run. No board here ever needs a guess.
Each one is defined by the hardest technique it requires, which is why an Expert board stays Expert.
Where to look, which technique applies, and only then the digit. The app knows twenty-two techniques by name.
Three puzzles a day, one of each kind. A perfect month earns a single tile — every day of it, not most.
Each one is a real board with the keypad live. Nothing is a video; you play every step.
Puzzles are made on your phone and your progress stays there. No account, no sign-in, no sync, no analytics.
Ads appear around play, never across it. A one-time purchase removes them entirely.
Close the app mid-board and come back to the same grid, the same clock and the same undo history.