**Portrait 3×3 number pad (iPhone only)** - In Settings, choose a single-row or 3×3 pad; side tools cover marks, candidates, hints, and more - Opening marks keeps the board visible with a dimmed toolbar; the marks panel stays clear of the grid **Hints** - The hint panel sizes itself to the text—compact when short, growing up to the board edge and scrolling inside when long, without covering the puzzle

- rollback to 1.3.3 for bug

1.5.0 **Portrait 3×3 number pad (iPhone only)** - In Settings, choose a single-row or 3×3 pad; side tools cover marks, candidates, hints, and more - Opening marks keeps the board visible with a dimmed toolbar; the marks panel stays clear of the grid **Hints** - The hint panel sizes itself to the text—compact when short, growing up to the board edge and scrolling inside when long, without covering the puzzle 1.4.0 **Unlock All Features** A new one-time purchase, not a subscription, with no automatic renewal - Unlocks every practice drill (Advanced, Expert and Grandmaster included), the classic puzzle library, and hint links to every technique lesson - Free: Beginner and Intermediate drills, plus X-Wing, XY-Wing and XY-Chain drills - Thank you, early players: 5 drills per technique from Beginner to Expert, 2 per Grandmaster technique, and the classic puzzle library stay free for you **Better lessons** - Redrawn AIC example: strong links inside a cell are shown, and strong/weak links strictly alternate - Simple Coloring and Multi-Coloring are now mastered by reading

- Update grandmaster skill library

Skill Practice - Progress at a glance: new progress dots on each skill page show how many exercises you have completed - Leave anytime, resume anytime: the next session picks up right where you stopped - Correct answers move you forward: a wrong answer comes with step-by-step reasoning — fix it and advance, never stuck Refreshed Practice Banks - Hidden Pair, Pointing Pair and more: refreshed banks with friendlier difficulty Other - The solver hint panel now slides up below the board instead of covering it

**User Feedback** Skill and hint improvement - Advanced, Expert, and Grandmaster drills are filled out - Strong/weak links and Auto Bivalue / Auto Strong Links now work in practice, not only in play - X-Wing, Swordfish, and Jellyfish hints talk in yellow/green groups (“two rows and two columns”) instead of listing every cell - Clearer ALS-XZ and ALS-XY-Wing lessons and hints

- All practice unlocked - Improved technique descriptions - Enhanced solving power

- improve skill details

**User Feedback** - Digit-first now works on practice boards, same as a regular game - Cell and candidate paint stay selected, so you can keep painting without tapping the tool again—unaffected by Cell-first or Digit-first - Modes are now Standard and Newspaper; Standard ends the game after 5 mistakes

**User Feedback** - Clearer number entry: Cell-first and Digit-first no longer interfere with each other - Fixed number entry issues during practice on iPad - Fixed oversized technique boards on iPad so the full grid stays on screen

• Smarter coloring: Auto Bivalue paints same candidate pairs the same color (singles in grey) so related cells stand out at a glance • Auto Strong Links: mark conjugate strong links for the digit you select—tap again to clear • Clear Cell & Settle: wipe one cell’s marks, or prune stale candidate colors and broken links • Closing the mark panel turns off auto marks while keeping anything you drew by hand

• Polish and stability improvements, smoother puzzle experience • Sudoku Solver + Solution Assessment: import a grid, solve it, and see technique difficulty and the solving path • One-tap share: after a win, share a victory card with your time and result

• Quick Fill – Automatically fill all cells that have only one possible candidate. One tap saves you from tedious data entry, so you can focus on real logic. Available in Hard, Expert, and Classic puzzle packs. Works best with "All Candidates" enabled. • Landscape support – Now fully optimized for both iPhone and iPad in landscape orientation. • Sudoku Solver – Added a built-in solver to help you analyze any puzzle. • Technique Practice – Enhanced the skill-training mode for a smoother learning experience.

This update improves the app from your feedback and adds a classic puzzle library. **User feedback** - Turning off auto-candidates now keeps the notes you wrote yourself - Daily Challenge is clearer: one puzzle per day, and it’s the same every time you open it **Daily Challenge** - Everyone gets the same puzzle on the same day - First time, best time, and clears are saved; reopen to see them, then tap “Challenge again” - A clearer sun mark appears on the activity calendar when you finish - Tap a past date to catch up on days you haven’t completed - The activity calendar starts from 26 Aug 2026 **Classic puzzles** - A new classic library so advanced players have somewhere to go - Includes contest history, hard 17-clue puzzles, and extra tough sets **Stats** - Completions and best times by Easy / Medium / Hard / Expert - Activity now shows hatch day and a sun mark for each finished daily **Also** - Random Hard and Expert puzzles are tougher and need more advanced techniques - Undo restores candidates that were cleared when you filled a number

- Add english version - Update name and description