DK Sudoku
A clean, ad-free Sudoku for people who actually want to think. No banner ads, no energy timers — just six difficulty tiers, graded by the logic each puzzle requires.
Difficulty means something here.
Most Sudoku apps grade difficulty by clue count. DK Sudoku grades every puzzle by the hardest solving technique it actually requires, so "Expert" always demands an Expert-level insight, not just a sparser grid.
Every puzzle is verified to have exactly one solution.
The tools serious solvers reach for.
Notes & pencil marks
Track candidates per cell without committing.
Step-by-step hints
Hints start subtle and escalate only as far as you ask.
A highlighting toolkit
Row, column and box, duplicates, identical numbers and mistake checking — each toggled independently.
Daily Challenge & streaks
One shared puzzle a day, with a streak calendar.
Personal statistics
Best times, best scores and mistake-free streaks, overall and by tier.
English & Deutsch
Available in English and German, with more languages planned.
Try it free, then unlock it your way.
Play 20 puzzles free to try the whole app. After that, unlock everything with a one-time purchase, or choose a low-cost quarterly subscription instead. There are no ads either way. Final prices will be shown in the store at launch.
DK Sudoku is made by DK Squared Studio. Privacy policy.