VariantDoku - Variant sudoku puzzles for careful solvers

VariantDoku is a calm iOS sudoku app for solvers who want deeper logic than a standard daily grid. Browse handcrafted variant and zero-givens puzzles, filter by difficulty and constraint type, and solve with candidate notes, colors, symbols, and optional error checking.

Hi Product Hunt, I built VariantDoku for sudoku solvers who enjoy the logic of killer cages, thermos, kropki dots, arrows, renban lines, palindromes, and zero-givens grids. The goal is a quiet, focused solving space with enough notation tools for hard puzzles without turning the interface into clutter. Shout-out to Logic Masters Germany, Sven from SudokuPad, and Cracking the Cryptic. Their communities, tools, and puzzle culture helped shape what I wanted VariantDoku to feel like. I’d love feedback from puzzle fans on the solving flow, puzzle library, and which variants you want next.

VariantDoku - Variant sudoku puzzles for careful solvers

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