Sudoku - Number Fun & Day Calm

「Sudoku」· A classic 9×9 logic puzzle for commute pockets. 「One grid at a time—turn spare minutes into clear thinking」 「Sudoku」 brings familiar 9×9 rules to a pocket session: tap a cell, enter 1–9, and make every row, column, and 3×3 box unique. Boards ship with a single solution. Five difficulties run Easy to Expert—free through Medium—and a free Daily Puzzle keeps a streak without eating your new-game quota. Notes, teaching hints, undo, and erase keep reasoning reversible; a timer, mistake limit, and pause-to-hide board protect focus. Auto-save, review, stats, and themes close the loop so a round can stop, continue, and be remembered. ——— Key Features ——— 1 Classic boards and difficulty rhythm · Standard 9×9 unique-solution boards: fill from the bottom number dock; digits that already appear nine times gray out. Same-puzzle Retry clears progress and restarts the timer without swapping the board. · Easy through Expert auto-generation: free covers Easy, Normal, and Medium; Hard and Expert are Plus. Free players get three new boards a day; Plus has no daily cap—match difficulty to energy. · Daily Puzzle is free for everyone and locks to Normal that day: finish to check in without spending a free new-game slot. Short daily sessions beat weekend marathons; missed days still show in streak stats. 2 Solving aids and in-round focus · Toggle notes and pen anytime: mark candidates, then commit. Teaching hints explain why a digit fits, then fill on a second tap; if nothing can be explained, they give the answer. Caps: three free, five Plus. · Undo and erase form a forgiveness loop: step back through fills, notes, and hints, or clear the current cell. Mistakes spend lives (three free, five Plus) so you slow down near the limit. · Timer, pause-to-hide, and highlights work together: pause hides filled digits; selection highlights row, column, box, and matching digits so clashes jump out. 3 Resume, settle, and personal review · Auto-save covers in-progress and paused states: force-quit, switch apps, or take a call and return to the same board and clock. · Win when complete; lose when lives hit zero, with paths to continue or start anew. After a fail you can freely review wrong cells; Plus can continue once on the same board—mistake count clears while progress and timer stay. · Today’s summary (games, wins, Daily, free games left) is free; full history—totals, win rate, streaks, best times—unlocks with Plus. Warm Paper is free; Quiet Blue, Bamboo Green, and other mood themes recolor board and controls. ——— Real-World Scenarios ——— · Morning subway: open Normal with notes and pause-to-hide when the seat beside you leans in; resume tonight, then drop a quiet check-in in WhatsApp. · Ten-minute lunch: skip TikTok and take Daily against the clock; check in, then return sharper than after a feed binge. · Before lights-out: switch to Quiet Blue, lean on undo instead of hints; finish one board before Instagram. ——— Subscription ——— Unlock Plus with a purchase or subscription (unlimited new games, Hard/Expert, continue-after-failure, full stats, themes, extra hints and lives—details in the app). Daily and Medium stay free. Payment charges your iTunes account; subscriptions renew within 24 hours before the period ends unless you turn auto-renew off. Manage anytime in Account Settings. Weekly plans include a 3-day free trial. Weekly — $0.99/week Monthly — $1.99/month Yearly — $2.99/year (Prices may vary by country or region; the price shown in the app prevails.) Privacy Policy: https://aihejiudeyudaye.github.io/Sudoku/privacy-policy.html Terms of Use: https://aihejiudeyudaye.github.io/Sudoku/terms-of-use.html Contact Us: piaochensuifeng@gmail.com 「Sudoku」——quiet logic you can carry—spare minutes that leave a clear mark. 【Download Now】Start today with Daily or a Medium warm-up you can pause, resume, and finish.