Sudojo vs Lattice Sudoku

Sudojo is the ultimate Sudoku learning platform that teaches you how to solve puzzles — not just gives you answers. Progress from beginner to expert through a structured belt system while mastering 60+ real solving techniques used by championship players. DAILY CHALLENGES • A fresh puzzle every day tailored to your skill level • Track your daily streak and compete with yourself • Share your completed puzzles with friends LEARN 60 SOLVING TECHNIQUES • Each technique includes step-by-step explanations and practice puzzles Basics: Full House, Hidden Single, Naked Single Pairs & Tuples: Hidden Pair, Naked Pair, Locked Candidates, Hidden Triple, Naked Triple, Hidden Quad, Naked Quad Fish: X-Wing, Swordfish, Jellyfish, Squirmbag Finned Fish: Finned X-Wing, Finned Swordfish, Finned Jellyfish, Finned Squirmbag Sashimi Fish: Sashimi X-Wing, Sashimi Swordfish, Sashimi Jellyfish Franken Fish: Franken X-Wing, Franken Swordfish, Franken Jellyfish Wings: XY-Wing, XYZ-Wing, WXYZ-Wing, VWXYZ-Wing, UVWXYZ-Wing, TUVWXYZ-Wing, STUVWXYZ-Wing Single-Digit Patterns: Skyscraper, Two-String Kite, Empty Rectangle, Simple Coloring, W-Wing, Remote Pairs, Crane, Firework Unique Rectangles: Type 1, Type 2, Type 3, Type 4, Type 5, Hidden UR, Avoidable Rectangle Almost Locked Sets: ALS, ALS-XZ, ALS Chain, Sue de Coq, Death Blossom Chains: X-Cycles, Grouped X-Cycles, X-Chain, XY-Chain, AIC, Medusa Coloring, BUG+1, Forcing Chains, Forcing Net SMART HINT SYSTEM • Hints that teach you the technique, not just the answer • Visual highlighting shows exactly which cells and candidates matter • Step-by-step walkthrough of the solving logic • Learn the "why" behind every move BELT PROGRESSION SYSTEM • 12 belt levels from White Belt (beginner) to Black Belt (master) • Each belt introduces new techniques and harder puzzles • Earn points, unlock badges, and track your improvement • See your solving skills grow over time 12 DIFFICULTY LEVELS • Beginner to Extreme — there's always a new challenge • Each level focuses on specific techniques • Free access to foundational levels • Premium unlocks advanced and expert difficulties MORE FEATURES • Enter custom puzzles manually or scan from paper • Multiple display modes: Numbers, Kanji (漢数字), or Emoji • Pencil marks with auto-candidate mode • Timer and error highlighting (optional) • Dark mode and 16 language options • Sync progress across devices with your account • Works on iPhone, iPad, and Mac FREE & PREMIUM • Play daily puzzles and beginner-to-challenging levels for free • Subscribe to unlock advanced levels, expert techniques, and full hint access • Blue Belt: Unlocks Difficult, Intense, and Expert levels • Red Belt: Unlocks all levels including Brutal and Brain Freeze Whether you're picking up Sudoku for the first time or you're an experienced solver looking to learn advanced techniques, Sudojo is your path to mastery. Terms of Use: https://sudojo.com/en/terms Privacy Policy: https://sudojo.com/en/privacy

Lattice is a Sudoku built for people who actually want to think. A new puzzle every day, no ads, and the kind of quiet, considered design that makes a 20-minute solve feel like time well spent. WHAT'S INSIDE Daily Sudoku A fresh puzzle every day. Solve it on the train, before bed, with your coffee. Your streak lives at the top of the home screen, and the week-letter strip shows where you are. Practice anything Five difficulty tiers, from quick coffee-break grids to puzzles that will keep you company for an hour. Notes, hints, undo, and handwriting input are all where you expect them. Friends and duels (new) Add friends by @handle. Invite them to a head-to-head duel on a shared puzzle — highest score wins. Quick Match pairs you against someone in the world if you'd rather not wait for a friend. The new Notifications Center keeps friend requests, duel invites, and tournament updates in one place. Tournaments Compete in the Weekly Cup and other timed tournaments. Past tournaments stay in your archive so you can look back at how you placed. Tutor library (Premium+) Interactive, step-through lessons on the techniques that separate a fast solver from a stuck one — X-Wing, Swordfish, Jellyfish, XYZ-Wing, W-Wing, Simple Coloring, and more. Each lesson has an example board you play through, not a diagram you stare at. Three languages Lattice now speaks English, German, and French end-to-end — interface, lessons, push notifications, the lot. Made for the way you actually play Light, dark, and sepia themes. iPad supported. Swipe from the edge to go back. Sign in with Apple. iCloud-backed progress so you never lose a streak. THREE WAYS TO PLAY — Free: daily puzzle, practice across all difficulties, three friend duel invites per day, achievements, statistics. — Premium: unlimited friend duel invites, lives, full tournament access. — Premium+: everything in Premium plus the Tutor library, with example boards for every technique. One-time Lifetime purchase available if you'd rather not subscribe.