Lumen Sudoku Killer & X

Five sudoku games in one free app, fully playable offline: Classic, Killer, Sudoku X (both diagonals), Jigsaw (irregular regions) and Odd/Even. 1250 levels in total, 250 per variant, plus a fresh daily grid every morning.

FIVE VARIANTS, ONE GAME • Classic: rows, columns and 3×3 blocks. • Killer: sum cages with few given digits, for players who love the math. • Sudoku X: both main diagonals must also contain 1-9. • Jigsaw: the 3×3 blocks give way to nine irregularly shaped regions. • Odd/Even: marked cells only accept odd or even digits.

Each variant has its own 250-level ladder, its own accent colour and a one-page "How to play" primer.

1250 LEVELS, A CAREFULLY TUNED CURVE Every grid is generated and checked to have a single unique solution, with difficulty rising smoothly from level 1 to level 250. A global level tracks every win across all five games and moves you up the ranks, from Novice to Grand Master.

DAILY CHALLENGE One grid a day, the same for everyone, playable even offline. A monthly calendar keeps track of your wins and feeds your daily streak.

100% OFFLINE No connection needed to play. No account, no sign-up form, no server. Your progress never leaves your device. The app is available in 10 languages.

FREE, WITH ADS ONLY IF YOU CHOOSE Two free games a day, on top of the daily challenge, which is always included. Need one more game or a hint? A short rewarded ad, only if you choose to watch one. No banners, no ads interrupting your game.

LUMEN UNLIMITED (optional) Unlimited games, zero ads, 3 hints per game. One-time purchase, 3.99, yours forever, no subscription.

ACHIEVEMENTS AND LEADERBOARDS Sign in silently to Game Center to unlock 15 achievements and climb 6 leaderboards, one global and one per variant. No sign-up required; the app stays fully playable offline if you would rather skip it.

A logic and number puzzle, no wifi needed, from your very first sudoku to expert level.