# Numlock Sudoku > Numlock Sudoku (iPhone/iPad app by Daniel Albu.) - Source: https://appshunter.io/ios/app/numlock-sudoku/id6765949592 (this page in markdown: same URL + `.md`) - Developer: [Daniel Albu](https://appshunter.io/developer/1797350328) - Category: Games, Casual, Puzzle - Price: Free - Age rating: 4+ - Requires: iOS 17.6 · 13 MB - Languages: English - Released: 2026-05-05 - Data updated: 2026-06-02 - User reviews in markdown: https://appshunter.io/ios/app/numlock-sudoku/id6765949592/reviews.md ## What is Numlock Sudoku? Numlock Sudoku is the Sudoku game you've been looking for. Clean, modern, and endlessly replayable with two distinct game modes that cater to every type of player. Classic Mode: Pure Sudoku, no pressure. Take your time, think it through, and solve at your own pace. Mistakes are highlighted to help you learn, but there's no penalty. Unlimited hints when you need a nudge. Perfect for relaxing or sharpening your skills. Arcade Mode: Three lives. Three hints. One shot. Every wrong answer costs a heart. Lose all three and it's game over. Race the clock and see how far you can go. Built for players who want a challenge. Endless Levels: Every difficulty has an infinite number of unique, procedurally generated puzzles. Easy, Medium, Hard, and Expert. Each level is deterministic — come back and replay any puzzle you've faced before. Smart Features: • Pencil mark notes to track possibilities • Auto-remove notes when you place a number • Highlight matching numbers and related cells • Number pad tracks remaining counts per digit • Haptic feedback for mistakes • Timer and personal best tracking per difficulty • Dark mode support Customizable Experience: Toggle highlights, auto-notes, haptics, and theme from the settings. Play your way. Track Your Progress: Stats track your total wins and best times across all difficulties. Level progress is saved independently for Classic and Arcade modes. Beautifully designed. No ads. No clutter. Just Sudoku. ## Version history (last 4 releases) ### 1.04 — 2026-05-23 The biggest Numlock Sudoku update yet, built around the feedback you've given me. DAILY PUZZLE One handcrafted Hard puzzle every day. Same puzzle for everyone. Build a daily-solve habit. 40 NEW ACHIEVEMENTS 48 total, organized into 10 categories: Milestones, Speed, Mastery, Streaks, Combos, and more. Pop-up toast notifications when you unlock one mid-game. ARCADE GETS DEEPER Combo system rewards consecutive correct placements with on-screen feedback. Arcade win streaks tracked across runs. Comeback Kid achievement for winning with one life left. SMARTER STATS Weekly stats compare this week vs last. Personal Best banner appears when you beat your record. Stats per difficulty and mode. PICK UP WHERE YOU LEFT OFF Auto-save your in-progress game. "Continue" button on the main menu. POLISH & ACCESSIBILITY Color Blind mode. Animated gradient background (toggleable). Subtle board patterns. Cell pulses. Cascading entry animations. Smoother haptics. SHARE YOUR WINS Generate a shareable result card with stars, time, and stats. DIFFICULTY UNLOCKS Earn your way through the tiers. Hard and Expert open up as you win at Medium. MORE FROM DANIEL ALBU Discover other games I've built, including Zesty Match, Passcode Hacker, Heartflip, and Curtle, right from the Settings screen. Thanks for playing! Daniel ### 1.01 — 2026-05-08 Bug fixes! ### 1.00 — 2026-05-05 Bug fixes. ### 0.99 — 2026-05-05 No release notes. ## More apps by Daniel Albu - [Microscopic Puzzle](https://appshunter.io/ios/app/microscopic-puzzle/id6742197605) - [Unlock This: Timing is Key](https://appshunter.io/ios/app/unlock-this-timing-is-key/id6742394566) - [Hyper Mnemonic](https://appshunter.io/ios/app/hyper-mnemonic/id6742406383) - [Short Term Memory: Memory Game](https://appshunter.io/ios/app/short-term-memory-memory-game/id6742487128) - [Match Fall](https://appshunter.io/ios/app/match-fall/id6742500909) - [Solitaire Cardpool Reshuffled](https://appshunter.io/ios/app/solitaire-cardpool-reshuffled/id6742842553) All apps by Daniel Albu: https://appshunter.io/developer/1797350328 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-02.*