sudoku stars
Sudoku for iPhone

Pure logic. One solution. Your pace.

Classic and Killer Sudoku with hints that explain the technique. A new Daily Challenge every day, a streak to keep and seasonal postcards to collect.

Coming soon to the App StoreFree to download. Contains ads. Optional purchases.
See how it works
  • iPhone
  • iOS 17 or later
  • English
  • Free, with ads and optional purchases
Naked single

Here's a way in

Row 5, column 5 already sees 1, 2, 3, 4, 6, 7, 8 and 9. Only 5 fits.

Illustration. The board and hint are generated from a real puzzle.
What you get

Solve with a clear head

Pure logic, one solution per puzzle, and a game that tells you why a move works.

Hints that explain the technique

Stuck? A hint highlights the cells and explains the technique, so you understand why the next move works. Opening the explanation is free. Learn something with every puzzle, or just relax with a grid and a pencil.

  • Notes that clean themselves
  • Unlimited undo, always free
  • A Learn library with technique pages and practice puzzles
  1. Tap HintThe game finds the next logical step.
  2. Read why it worksThe cells light up and the technique is named.
  3. You decidePlace the digit yourself, or let the hint do it.
  • Naked single
  • Hidden pair
  • X-Wing

A new Daily Challenge every day

One puzzle a day, with a calendar archive. Earn crowns for flawless solves and a trophy each month. Seasonal events let you reveal postcards as you play.

  • A streak you can repair for free by solving yesterday's puzzle
  • Daily calendar with an archive
  • Seasonal events with postcards to reveal
Daily ChallengeIllustration

Your streak is safe.

Six levels, plus Killer Sudoku

Classic Sudoku runs from Easy to Extreme, and every puzzle has exactly one solution. Killer Sudoku is its own mode with four levels from Easy to Expert, its own short tutorial and its own stats.

  • Dark and light themes, with accent colors you unlock as you play
  • Plays offline, no account needed, your progress stays on your iPhone
  • Haptic feedback you can switch off
  • Climb 30 ranks named after real solving techniques, and collect awards

Classic

  • Easy
  • Medium
  • Hard
  • Expert
  • Master
  • Extreme

Killer

  • Easy
  • Medium
  • Hard
  • Expert
Good to know

Honest about ads and your data

Free to download, with ads

Sudoku Stars is free to download and contains ads: banners, video ads between puzzles and optional videos that give you extra hints. Remove Ads is an optional purchase that removes banners and full-screen ads. Optional reward videos stay available.

Puzzles play offline

Puzzles do not need an internet connection. Ads and purchases do.

No account needed

Your progress stays on your iPhone. You can wipe it any time from Settings.

A site with no tracking

This website has no cookies, no analytics and no third-party scripts. Read the privacy policy for what the game itself does.

Ready when you are

Sudoku Stars is coming to the iPhone App Store. Questions or ideas? Write to support@luminastudio.ai, or read the support page.

Coming soon to the App StoreFree to download. Contains ads. Optional purchases.