Solid Sudoku: Daily Puzzle
Classic. Calm. Offline. No ads
Free · In‑App Purchases
Most sudoku apps are mostly app. Solid Sudoku is mostly sudoku. A clean grid, a daily challenge, and the whole game free for 7 days.
A sudoku, not a platform.
Solid Sudoku is a classic 9×9 sudoku with a daily challenge — a calm, paper-styled logic puzzle, fully playable offline. Open the app, pick a difficulty, play.
Try everything free for 7 days. One small unlock keeps the whole game. No ads, ever. Nothing else to buy.
A REAL LOGIC PUZZLE
Every puzzle is generated on your device and always has exactly one solution — solvable by deduction, never by guessing. Four difficulty levels run from a gentle Easy to a properly stubborn Expert.
DAILY CHALLENGE
One puzzle a day, identical for every player in the world. Solve today's grid and see how your time stacks up — an anonymous percentile against everyone else who played. No account. No usernames. Just the number.
THE TOOLS YOU'D ACTUALLY USE
• Notes mode for pencil marks — cleared automatically when you fill the cell
• 3 hints per game. A hint adds 30 seconds to your adjusted time, so a solved grid still means something
• Full undo and redo — the move history even walks back hints and mistakes honestly
• Smart highlighting for the selected row, column, box, and matching numbers
• The number pad counts down how many of each digit are left
DESIGNED LIKE PAPER
The whole aesthetic is called Clean Paper: a warm white page, clues that look printed, your entries in soft blue ink. A fresh puzzle page every game, with a touch of retro pixel charm at launch.
NO INTERNET REQUIRED
Fully playable offline. On a plane. In a basement. Puzzles are generated on your device — no WiFi, no cellular, no waiting for a server. Even today's Daily Challenge works offline; only the percentile needs a connection. Your game saves itself and resumes exactly where you left off.
ONE HONEST UNLOCK
The whole game is free for 7 days — every difficulty, every tool, nothing held back. If it earns a spot on your home screen, one unlock keeps it: a small yearly subscription or a one-time lifetime purchase. No ads, ever. Nothing else to buy. No account, no sign-in — purchases use anonymous store IDs, there's no ad tracking, and your data is never sold.
A LITTLE STOIC CALM
Stoic quotes from Marcus Aurelius, Epictetus, and Seneca rotate through the app. A small moment of philosophy before the logic starts.
SUDOKU FEATURES
• Classic 9×9 sudoku with four difficulties: Easy, Medium, Hard, Expert
• Daily Challenge — the same seeded puzzle for everyone, every day
• Unique-solution puzzles, generated instantly on device
• Pause-aware timer — pausing never costs you time
• Three mistakes and the round is over — gentle stakes, honest wins
• Auto-save and resume across launches
• Full hardware keyboard support on iPad — arrows, digits, shortcuts
The whole game, right here. Pick a difficulty. Fill the grid. That's it.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://sudoku.doorgames.io/privacy/
Ratings & Reviews
A bigger board. The line under the number tray is gone and its space goes to the board, and on iPad in Split View the tools now stand beside the board instead of below it.
The home-screen widget now speaks all eight languages, and on smaller iPhones the title no longer gets cut short.
• A bigger board on most screens
• Tools beside the board in iPad Split View
• The widget in all eight languages
• Smaller fixes and polish throughout
Still no ads, no ad tracking, and no account.
The developer, DoorGames, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- DoorGames, LLC
- Size
- 43.2 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
English and 7 more
- English, Dutch, French, German, Italian, Polish, Portuguese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Full Version (Lifetime) $9.99
- Full Version (Annual) $2.99
- Copyright
- © 2026 DoorGames, LLC