Nineward Sudoku

StackForge Studios

In-app purchases

About this game

Sudoku should feel calm, sharp, and satisfying — not stuffed with ads, clutter, coins, popups, and twelve buttons nobody asked for.

Nineward Sudoku is a clean, modern Sudoku game built for people who want great puzzles, smart tools, and zero nonsense.

Play classic Sudoku, take on the daily challenge, try Killer Sudoku, race through Arcade Sprint, train on smaller boards, import your own puzzles, and sharpen your solving with hints that actually teach.

No ads. No fake coin economy. No “watch this video to continue having a personality.” Just Sudoku, done right.

PLAY YOUR WAY

• Classic 9×9 Sudoku
• A daily challenge — everyone gets the same board
• Killer Sudoku with cage sums
• Arcade Sprint for fast 5-minute sessions
• Mini boards for training and quick play
• Custom puzzle import
• Calm Mode for relaxed solving
• Challenge Mode for clean, streak-worthy runs
• Technique training to help you improve (some packs Pro)

SMART TOOLS, NOT SCREEN CLUTTER

Nineward gives you the tools serious solvers expect without making the board look like a control panel from 2007.

• Pencil notes
• Smart notes (Pro)
• Undo
• Pause
• Mistake tracking
• Same-number highlighting
• Row, column, and box highlighting
• Remaining number counts
• Auto-save
• Clean touch controls
• Dot notes and board-display toggles (Pro)

HINTS THAT ACTUALLY TEACH

A good hint should help you understand the next move, not just spoil the answer. Nineward’s hints name the technique they use — naked single, pointing pair, X-Wing — so you get better over time.

TRACK EVERY SOLVE

See your progress, review your history, and replay completed games like game tape.

• Solve history
• Stats
• Streaks
• Badges
• Perfect solve goals
• No-hint goals
• Replay library (Pro)

BRING YOUR OWN PUZZLE

Found a puzzle somewhere else? Import it into Nineward and solve it in a cleaner app.

BUILT FOR FOCUS

Nineward is designed around calm visuals, readable boards, and smooth interactions.

No ads. Ever.

WHAT’S FREE

The ranked daily challenge and its leaderboard, three Easy or Medium puzzles every day, the last three days of the Daily archive, unlimited Easy and Medium Killer Sudoku, unlimited Arcade Sprint runs, custom puzzle import, one teaching hint per puzzle outside competition play, your streak and badges, and the core solving tools.

GO PRO

The one-time Full Game Unlock adds Hard and Expert difficulties, no daily puzzle cap, up to 99 teaching hints per puzzle, every technique training pack, dot notes and board-display toggles, auto-complete, the full replay library, two years of the Daily archive, full stats, extra themes, cloud sync, and friend challenges. The ranked Daily and its leaderboard are the same for everyone. Or choose StackForge Play Pass (monthly or annual) — Pro in every StackForge game plus One Good Thing. Prices are shown before you buy. Manage or cancel in Google Play → Payments & subscriptions.

Privacy: https://stackforgestudios.com/privacy

Terms: https://stackforgestudios.com/terms

What’s new

Bug fixes and performance improvements.