Master Sudoku
Your personal sudoku coach — learn techniques, solve puzzles, master the game
Sudojo is your sudoku solver and coach in one. Whether you're learning the basics or tackling expert techniques, our intelligent hint system teaches you the 'why' behind every move. Enter custom puzzles or play our curated levels.
Two Ways to Learn Sudoku
Whether you prefer learning step by step or understanding the big picture first, Sudojo has you covered.
Techniques
Learn one technique at a time, from simple to advanced
Start with basic techniques like Naked Singles and Hidden Singles. Each technique has step-by-step explanations, visual examples, and interactive practice puzzles. Progress through 12 difficulty levels as you master each skill.
Browse all 60 techniques →
Strategies
Learn groups of related techniques that share the same logic
Strategies organize techniques by their underlying concept. Learn one strategy and you understand an entire family of techniques at once. For example, the "Basic Fish" strategy teaches you X-Wing, Swordfish, Jellyfish, and Squirmbag all at once.
Explore all 17 strategies →
Then play puzzles to put your skills into practice. Our smart hint system guides you when you get stuck.
Hints That Teach
Unlike other apps that just fill in answers, Sudojo's hints are designed to make you a better solver.
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See exactly which cells and candidates to focus on
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Learn the name and logic of each technique
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Apply the hint yourself to reinforce learning
"Look at row 3..."
Our hints guide your eyes to the right spot and explain the pattern, so you can find similar situations on your own.
Ready to Level Up Your Sudoku?
Play
Progress through difficulty levels
Techniques
Learn solving techniques
Strategies
Understand solving concepts
Daily Puzzle
A new challenge every day
Available on iOS and Android