VariantDoku: Variant Sudoku

VariantDoku is built for sudoku solvers who want deeper logic than a single daily grid. Browse a growing library of variant sudoku and zero-givens puzzles, learn new constraints at your own pace, and solve on a clean board designed for careful notation.

Features:

- Variant and zero-givens sudoku puzzles — killer cages, thermos, kropki dots, XV, arrows, renban, German whispers, palindromes, diagonals, and more
- Step-by-step tutorials for every variant, from your first 4x4 grid through mixed-constraint puzzles
- Voice narration for puzzle rules and tutorial steps — listen while you solve
- Search and filters for difficulty, grid size, and constraint type
- Candidate notes, colors, and symbols for advanced solving
- Safer drag-to-select that won't grab cells you didn't mean to pick
- Optional error checking and unlimited puzzle access with Variant+
- Local progress, streaks, and a quiet interface for long solving sessions
- Optimized for iPad in both portrait and landscape
- New to variant sudoku? A guided first-launch experience asks how familiar you are with sudoku and walks you through the basics, so you're never thrown into the deep end. Already comfortable? Skip straight to the puzzles.

Whether you're learning your first killer cage or chasing your hundredth zero-givens solve, VariantDoku gives you a calm place to practice and improve.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/