A fresh twist on classic Sudoku! Solve brain-training puzzles to reveal and collect stunning 4K nature photography.
Each day, 4 new Sudoku puzzles are available in a 2×2 layout — 2 Easy and 2 Medium difficulty levels. Fill in the 9×9 grid so that every row, column, and 3×3 box contains the digits 1 through 9. As you solve puzzles, you reveal pieces of beautiful nature photography hidden beneath the grid.
Each puzzle you solve reveals a corresponding piece of a stunning nature photograph. Complete all 4 daily challenges to unlock the full image. All users can view the full 4K photo in-app once unlocked. For downloading: Free users can save photos in 1080p resolution, while Premium users can download the full 4K version without watermarks.
Daily Sudoku offers several tools to assist you:
Complete at least one daily puzzle each day to build your streak. Your streak shows how many consecutive days you've played. Miss a day and your streak resets. Check your statistics to see your current and best streaks.
Yes! All daily puzzles are available offline. You can play anytime, anywhere without an internet connection. An internet connection is only needed to download high-resolution photo assets.
No. Daily Sudoku requires no registration or sign-in. You can start playing immediately. All your progress is stored locally on your device.
Yes! You can toggle dark mode, haptic feedback, error highlighting, and same number highlighting in the settings. You can also choose your preferred photo style theme — Free users have access to the Nature style, while Premium users can unlock all available styles.
Photos you've saved to your device's photo library will remain even after uninstalling the app. However, your in-app progress, statistics, and achievements will be lost since all data is stored locally on your device.
Last updated: January 30, 2026
Daily Sudoku is designed with a privacy-first approach. We collect minimal information:
We do not collect:
All game data — including puzzle progress, streak records, achievement progress, app preferences, and statistics — is stored locally on your device using local storage and a local database. This data is not transmitted to any server.
The app downloads nature photography from our servers for display within the app. When you choose to save a photo, the app requires access to your photo library. We do not access, upload, or share any of your existing photos.
Premium features are available through auto-renewable subscriptions (monthly or yearly). All payment processing is handled by Apple (App Store) or Google (Google Play). We do not collect or store any payment information. Subscription status is verified through the respective platform's purchase APIs.
Daily Sudoku does not knowingly collect personal information from children under the age of 13. The app does not require any personal information to function.
Since all game data is stored locally on your device, your data is protected by your device's built-in security features. No game data is transmitted over the internet except for downloading photo assets and serving advertisements.
You can delete all app data at any time by uninstalling the app from your device. Downloaded photos saved to your photo library will remain unless you manually delete them.
We may update this Privacy Policy from time to time. Any changes will be reflected on this page with an updated "Last updated" date.
The app is provided "as is" without warranties of any kind, either express or implied. We are not liable for any damages arising from use of the app.