# Sudoku Atlas: 4x4 to 25x25 — No ads. Big grids. Pay once. > Sudoku game with all grid sizes, no ads, one-time purchase. (iPhone/iPad app by JORGE MONTERO VARELA.) - Source: https://appshunter.io/ios/app/sudoku-atlas-4x4-to-25x25/id6772748461 (this page in markdown: same URL + `.md`) - Developer: [JORGE MONTERO VARELA](https://appshunter.io/developer/6772748463) - Category: Games, Puzzle - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.0 · 25 MB - Languages: English - Released: 2026-06-11 - Data updated: 2026-09-10 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/sudoku-atlas-4x4-to-25x25/id6772748461/reviews.md ## What is Sudoku Atlas? Sudoku the way you actually want it: every grid size, no ads, no tracking, and a single one-time purchase. Pay once, own it forever. EVERY GRID SIZE From quick 4×4 and 6×6 warm-ups to the standard 9×9, all the way up to sprawling 16×16 and 25×25 marathons. The full spectrum, from two-minute breaks to multi-day challenges. A FREE DAILY PUZZLE THAT NEVER EXPIRES A new 9×9 every day, free forever, no account required. Difficulty cycles through easy, medium, hard, and maximum. The free version isn't a teaser. It includes a demo bank of puzzles across every grid size and difficulty so you can try everything before you decide. FOCUS MODE Pick a cell and every value but one blurs away, placed digits and pencil marks alike. Your chosen number stays crisp so you can scan the whole board and see exactly where it can still go. STAMP MODE Lock a digit and stamp it across the board in one motion. Pencil marks for candidates, glyph stamps for confident answers. Switch freely between them. CHECKPOINTS Save your board at any point and rewind if you hit a dead end. Try bold moves without fear of losing progress. SEED SHARING Every puzzle has a seed code. Share it and a friend gets the exact same grid in the exact same starting state. Race, compare, collaborate. LIGHT, DARK & HIGH CONTRAST Follows your system appearance and language by default. Light, dark, high-contrast themes and language can all be set manually. NO ADS. NO TRACKING. ONE PURCHASE. There is no ad SDK in this app. No analytics, no crash reporters, no account system, no server that knows you exist. Everything runs on your device and stays there. One purchase unlocks unlimited generation, all grid sizes, and seed sharing — no subscription, ever, and no previously free feature will ever move behind a paywall. These aren't marketing promises. They're structural decisions, and they're permanent. ## Key features - All grid sizes (4x4 to 25x25) - Free daily 9x9 puzzle - Focus Mode for clarity - Stamp Mode for efficient input - Checkpoint saving and rewinding - Seed sharing for puzzles - Light, dark, and high-contrast themes ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Unlock full version | $4.99 | one-time | ## Frequently asked questions about Sudoku Atlas ### What grid sizes does Sudoku Atlas offer? Sudoku Atlas offers a comprehensive range of grid sizes, starting from quick 4x4 and 6x6 puzzles, through the standard 9x9, and extending to larger 16x16 and 25x25 challenges. ### Is Sudoku Atlas free to play? Yes, Sudoku Atlas is free to download and includes a free daily 9x9 puzzle that never expires. A one-time purchase unlocks all features and grid sizes permanently. ### Does Sudoku Atlas have ads? No, Sudoku Atlas is completely ad-free. The app has no ad SDK, ensuring an uninterrupted gaming experience. ### Can I save my progress in Sudoku Atlas? Yes, Sudoku Atlas features checkpoints that allow you to save your board at any point and rewind if you make a mistake or want to try a different strategy. ### How does the 'Focus Mode' in Sudoku Atlas work? Focus Mode in Sudoku Atlas helps you concentrate by blurring away all values except for one. This makes it easier to scan the board and see where your chosen number can be placed. ### Can I share puzzles with friends in Sudoku Atlas? Absolutely. Every puzzle in Sudoku Atlas has a unique seed code that you can share with friends, allowing them to play the exact same grid in the same starting state. ### What devices is Sudoku Atlas available on? Sudoku Atlas is currently supported on iPhone and iPod devices. ### How often is Sudoku Atlas updated? The latest version of Sudoku Atlas was released on 2026-06-25, indicating regular updates to improve the application. ## Version history (last 5 releases) ### 1.0.15 — 2026-09-08 History and Favorites now ask before they replace a puzzle you already have in progress. Tapping the same daily, demo, or open puzzle just resumes where you left off. ### 1.0.14 — 2026-08-17 After you leave a completed puzzle, we may occasionally ask if you'd like to rate Sudoku Atlas. The prompt never appears on the victory screen itself. Not now postpones it. ### 1.0.13 — 2026-07-25 Achievement progress is now easier to follow. Every goal includes a progress bar, so you can see at a glance how close you are to unlocking it. ### 1.0.10 — 2026-06-25 - New: a Reset button to clear the board and start the puzzle over from its original state. - New: the grid now flags when it's completely filled but not yet correct, so you know to keep looking instead of wondering why nothing happened. No ads, no tracking, one purchase. Always. ### 1.0 — 2026-06-11 No release notes. ## Apps similar to Sudoku Atlas | App | Rating | Price | Category | | --- | --- | --- | --- | | [Brain Exercise Games: 99 Box](https://appshunter.io/ios/app/brain-exercise-games-99-box/id1598531719) | — | Free | Games | | [Sudoku - Story Mode](https://appshunter.io/ios/app/sudoku-story-mode/id6755789855) | — | Free | Games | | [Codewords Pro](https://appshunter.io/ios/app/codewords-pro/id1137372438) | 4.8 (259) | Free | Games | | [Goods Blast: Sorting Puzzle](https://appshunter.io/ios/app/goods-blast-sorting-puzzle/id6654903160) | 4.8 (3,668) | Free | Games | | [Logic Riddle-Puzzle Games](https://appshunter.io/ios/app/logic-riddle-puzzle-games/id1594607267) | 4.7 (23,376) | Free | Games | | [No WiFi Games - Offline Games](https://appshunter.io/ios/app/no-wifi-games-offline-games/id6468956525) | 4.6 (6,261) | Free | Games | ## More apps by JORGE MONTERO VARELA - [Fretmancer](https://appshunter.io/ios/app/fretmancer/id6792365827) All apps by JORGE MONTERO VARELA: https://appshunter.io/developer/6772748463 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-10.*