Duoku vs Sudoku Infinity

Your Sudoku skills are about to get tested. Four difficulty levels, a 3-mistake limit, and a ticking clock — every game is a race against yourself AND your friend. Share any puzzle with a friend and settle it on the same board. SHARE & COMPETE Every puzzle has a unique 4-character code. Send it to a friend, scan a QR code, or tap a link — you'll both play the exact same board. No more "I had an easier puzzle." Same grid. Same solution. Settle it. CHALLENGE YOURSELF Pick from Easy, Medium, Hard, or Expert. Each wrong move counts — three mistakes and it's game over, with a 60-second time penalty on every error. Use pencil notes to plan ahead, undo when you need to rethink, and push for a clean solve. TRACK EVERYTHING Your stats dashboard breaks down win rates, best times, average solve speeds, and mistake counts — all by difficulty. Chase personal records. Watch yourself get faster. BUILT FOR FOCUS No account required. No clutter. Autosave picks up exactly where you left off. Dark mode for late-night sessions. Haptic feedback on every tap. Designed to feel like it belongs on your phone. FEATURES • 4 difficulty levels — from beginner-friendly to expert-only • Pencil notes for tracking candidates • Undo and erase in one tap • Timer tracks every second • Smart highlighting for rows, columns, and matching numbers • Unplayed puzzles are served first • Continue any game, anytime • Full VoiceOver accessibility • Works offline

Master the art of sudoku like never before. Sudoku Infinity goes far beyond classic puzzles -- with 8 unique variants and real-time PvP multiplayer, every session brings a fresh challenge. Whether you're a seasoned solver or just getting started, this is the sudoku app you've been waiting for. ◆ 8 SUDOKU VARIANTS ◆ Not just another classic sudoku app. Push your logic to the limit with: • Classic Sudoku -- The timeless original. Pure logic, pure satisfaction. • Killer Sudoku -- Cages with sum clues replace traditional givens. Math meets logic in the most addictive way. • Greater Than Sudoku -- Inequality signs between cells guide your deductions. Every comparison is a clue. • Odd/Even Sudoku -- Shaded cells reveal whether numbers are odd or even, adding a whole new layer of strategy. • Anti-Knight Sudoku -- No two identical numbers a knight's move apart. Chess logic meets sudoku brilliance. • X-Sudoku -- Both main diagonals must also contain 1-9. A simple twist that changes everything. • XV Sudoku -- Roman numeral clues mark pairs that sum to 5 or 10. Elegant and deeply satisfying. • Consecutive Sudoku -- Bars between adjacent cells mean the numbers differ by exactly 1. No bar? Not consecutive. A subtle constraint that transforms every placement. Each variant features carefully crafted puzzles across multiple difficulty levels, from beginner-friendly to brutally hard. ◆ REAL-TIME PvP MULTIPLAYER ◆ Think you're fast? Prove it. Sudoku Infinity is one of the only sudoku apps with live head-to-head competition: Online Matchmaking -- Jump into ranked matches and compete against players worldwide. Same puzzle, same clock, one winner. Friend PvP -- Create a private room and invite a friend for a direct showdown. Both players need the app installed -- then it's game on. Race to solve the same puzzle in real time. Watch your opponent's progress. Feel the pressure. Claim victory. ◆ WHY PLAYERS LOVE IT ◆ • Endless variety -- 8 variants means you'll never run out of new challenges • Compete anywhere -- PvP works online with friends or strangers • Clean design -- Distraction-free interface built for focused solving • All skill levels -- From casual to expert, every puzzle is beatable • Fresh puzzles -- A deep library that keeps growing ◆ WHO IS THIS FOR? ◆ → Sudoku fans who've mastered classic and crave something new → Competitive minds who want to test their speed against real opponents → Friends looking for a fun, brain-teasing way to play together → Puzzle lovers exploring variants like Killer, Anti-Knight, and X-Sudoku for the first time Ready to go beyond ordinary sudoku? Download Sudoku Infinity and discover how deep the puzzle goes.