Sudoku Academy: Learn Logic

Sudoku Academy is an offline Sudoku game that teaches the reasoning behind every move. Start with tiny 4×4 boards, grow into classic 9×9 puzzles, and learn the techniques expert players use.

PLAY NOW – FROM SUPER EASY TO EXPERT
• Super easy 4×4 and 6×6 boards: big squares, big number keys, a fresh puzzle every time. Mistakes never end the game; the board just counts mistakes, hints and your time.
• Classic 9×9: 6,000 puzzles, 1,500 each for Easy, Medium, Hard and Expert. Unplayed puzzles come first.
• Notes, undo, erase and remaining-digit counts. Choose a three-mistake limit, five mistakes or unlimited.

HINTS THAT EXPLAIN THE REASONING
The lightbulb opens a guided sequence: observe the area, see the evidence, then apply the deduction. Step back or forward at any time. A number is placed only when you choose the final step, and one hint covers the whole walkthrough. Hints have a daily top-up; rewarded ads can give more when you run out.

LEARN EIGHT TECHNIQUES
From Naked and Hidden Singles through Pairs, Pointing Pairs, Box/Line Reduction, Naked Triples and X-Wing. Each technique has a worked example and its own practice set, 184 positions in total. Master a technique by solving three different puzzles without mistakes or hints.

CHALLENGE MODE AND 465 KEEPSAKES
Win five games to unlock Challenge: one continuous map where levels open in order. The first 300 levels are curated, with a named gate every 20 levels, and the road keeps going after that. Finish a chapter to earn a keepsake and collect 31 sets of 15.

A NEW PUZZLE EVERY DAY
The Daily calendar highlights today and lets you catch up on missed days of the current month.

CREATE, PRINT AND SAVE
• Create: choose a difficulty and type your own puzzle, or let the app make a random one for that level. Validate it for a single solution, explore the logical steps or play it.
• Print a puzzle (with an optional answer page) through your device's print dialog, or save it as an image to your photos. Printing from a game in progress uses a different puzzle of the same difficulty, so your result stays fair.

MADE FOR EVERY SCREEN
• Rotate freely: automatic, portrait or landscape, set in Settings. Tablets get a larger board with two-row number keys in landscape.
• Light and dark themes.
• 14 languages: English, Vietnamese, Spanish, Portuguese, French, German, Indonesian, Japanese, Korean, Simplified Chinese, Thai, Russian, Filipino and Hindi.
• Completed rows, columns and boxes glow in sequence.

All Sudoku modes work offline without an account. Progress stays on your device. The game contains ads; loading ads requires an internet connection.