About
Enjoy classic logic puzzles in a peaceful environment. Offers daily challenges and a large library of puzzles with honest difficulty levels. Designed for privacy with no ads, subscriptions, or tracking.
What's New in Calm Sudoku
1.0.6
September 5, 2026
The library now holds 525 hand-verified puzzles — 175 in each difficulty. Landscape play got roomier: a bigger board, and a finish screen that fits in one view instead of scrolling. History is tidier — clear a single solve time you'd rather not keep, and the "Flag incorrect entries" option now stays where you set it. Still no ads, no tracking, no subscription.
MoreIn-App Purchases
$4.99
The Complete Library
The full catalog + 90-day archive. One-time purchase.
Developer apps
FAQ
Does Calm Sudoku have ads?
No, Calm Sudoku is designed to be ad-free. The description explicitly states 'No ads' and emphasizes a quiet, uninterrupted puzzle-solving experience.
How much does Calm Sudoku cost?
Calm Sudoku is free to download and play the daily puzzle forever. You can unlock the complete catalog of puzzles with a one-time purchase.
Can I play Calm Sudoku offline?
Yes, Calm Sudoku is designed to be played offline. The description highlights that it works 'offline, on your iPhone and iPad' without requiring an internet connection.
What devices is Calm Sudoku available on?
Calm Sudoku is available on iPhone and iPad. It features adaptive layouts for both devices and supports hardware keyboard input on iPad.
Does Calm Sudoku collect my data?
No, Calm Sudoku is private by default and does not collect any user data. Everything stays on your device, and no tracking is involved.
What are the difficulty levels in Calm Sudoku?
Calm Sudoku offers three honest difficulty levels: Easy, Moderate, and Challenging. These levels are tuned by the solving techniques they require, ensuring distinct gameplay.
How often are new puzzles added to Calm Sudoku?
A new daily puzzle is provided every day, free forever. The app also includes a generous starter library, and unlocking the complete catalog gives you access to all current and future puzzles.
Is Calm Sudoku suitable for visually impaired users?
Yes, Calm Sudoku is built with accessibility in mind. It offers full VoiceOver support, Dynamic Type, and Reduce Motion options.