A hundred hand-built contraption puzzles, free on the web and iPhone
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A genuinely new rule set for fans of Nonograms and Minesweeper-style logic, free to play in full, and every puzzle has exactly one solution.
Kin is a logic puzzle for iPhone and iPad. You set each tile to filled or outlined, and each number counts how many orthogonal neighbours share its own style, so the same digit means different things depending on its tile. Campaign, daily and freeplay modes are free, with ads between puzzles. A $5.99 purchase removes ads and themes are $0.99. It is by Arman Matinyan, now at version 1.1.4; Android is listed as coming.
A hundred hand-built contraption puzzles, free on the web and iPhone
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