Sudoku & Killer: SudoKoi

〉No ads. No paywalls. Just great puzzles.

SudoKoi is the Sudoku app that gets out of your way.
Open it, pick a puzzle, and play. No account. No loading screens. No interruptions — ever.

Most puzzle apps are built around ads and dark patterns. SudoKoi is built around the puzzle.

〉Everything You Need. Nothing You Don't.

• Classic Sudoku + Killer Sudoku in one app
• 5 difficulty levels — Easy to Expert
• Smart notes and candidate tracking
• Helpful highlights and error detection
• Fast, intuitive number input
• Play up to 9 games at once
• Scan printed Sudoku puzzles from paper
• Track your stats and watch yourself improve
• Share puzzles with friends

〉Fits Into Your Day

Whether you have 2 minutes or 20, SudoKoi is there.
Fully offline. No login. No loading screens eating your time.
Optimized beautifully for iPhone, iPad, and Mac.

〉Start Free. Upgrade Only If You Want To.

A handpicked selection of Classic and Killer puzzles is always free — no timer, no artificial limit.
SudoKoi+ unlocks everything:
• Thousands of handcrafted puzzles
• Unlimited play across all packs
• Monthly, yearly, or one-time lifetime options

Privacy Policy: https://sudoku.efabian.me/privacy/
Terms of Service: https://sudoku.efabian.me/terms/