Sudoku Den
Android app by Den Media LLC. Puzzle · Den Media LLC
- Store rating
- Unknown
- Store rating count
- Unknown
- Download price
- Free to download
- In-app purchases
- Listed by the store
- Version
- 1.0.0
- Listing last refreshed
- 2026-09-18
View the original store listing
Store description excerpt
Most sudoku apps decide difficulty by counting how many digits they hid. That is why their "Expert" is sometimes easier than their "Hard", and why a strong solver runs out of game in a week. Sudoku Den grades every board by the hardest logical step our solver needs to finish it, on the public Sudoku Explainer scale. The number is on the card before you start, and the technique is named. You can check us against anything else you have played. NINE TIERS, 980 BOARDS Gentle through Nightmare, SE 1.0 to 9.2. The easy end is genuinely gentle. The hard end needs cell forcing chains, and nothing in it is padding. EVERY SOLVE LEAVES A RECEIPT Finish a board and it tells you the hardest step our solver used to get there, with a link to a plain-English explanation of how that technique works. Learn the logic instead of guessing at it. THREE MORE GEOMETRIES X-Sudoku, Hyper and Jigsaw — 840 more boards, every one certified to have exactly one solution and to never require a guess. BUILT FOR PEOPLE WHO ACTUALLY SOLVE - Unlimited undo and redo. Free, always. - Pencil marks with a real notes mode - Highlight every placement of a digit - A hint that explains the next step instead of just filling a cell - Five colour-vision modes, each with a second non-colour channel - A fully labelled board for screen readers — rare in this category - Light and dark, or follow your phone NO LIVES. NO HEARTS. NO ENERGY. Nothing stops you playing. No timer pressures you, no board is locked behind a payment, and every difficulty tier is free. A DAILY PUZZLE The same board for everyone, every day, with a calendar you can fill in afterwards if you miss one. Den Digital LLC
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