Version 1.4 — Achievement Progress & Daily Hints ACHIEVEMENT PROGRESS TRACKING Every achievement now shows a progress bar with your current count vs. the goal. See exactly how many games, streaks, or wins you need to reach each milestone. Progress updates live from your game history every time you open Achievements. DAILY BONUS HINTS You now receive 1 free hint added to your balance every day you open the app. Hints accumulate — if you don't use them, they stack up. Open the app daily to build your hint reserve. IMPROVEMENTS - Achievement progress syncs with your full game history, including past games - Simplified hint system with a single unified hint balance - Locked achievements show progress bar instead of lock icon for better visibility

Version 1.3 — Performance & Polish LIGHTNING-FAST PUZZLE GENERATION Completely rewritten solver engine using bitmask constraint propagation. All puzzles — including Master and Grandmaster — now generate instantly. No more loading delays. SMARTER DAILY CHALLENGE - The Daily Challenge popup now only appears until you complete or lose today's puzzle. Once done, it won't pop up again until tomorrow. - Daily Challenge and Streak Protection notifications now stop for the day once you finish. No more unnecessary reminders. - Completing a Daily Challenge no longer accidentally starts a new game. The completion screen shows "Back to Menu" for daily puzzles. IMPROVED SUDOKU X VISUALS - Diagonal cells now use a warm orange tint instead of blue, clearly distinct from the number-highlight color. - Diagonal highlighting stays visible even when selecting cells in the same row or column. ADDITIONAL FIXES - Sound effects now respect the iOS silent switch across the entire app - Saved games from older versions load correctly with the new Sudoku X field - Puzzle generation is now a clean single-pass for all difficulties - Fixed daily challenge lock not persisting after app restart - Fixed achievement unlock overlay showing twice - Fixed erase notes requiring multiple undos instead of one - Fixed mistake counting when error checking is disabled

Version 1.2 — Master the Ultimate Challenge NEW DIFFICULTY LEVELS • Master — for experienced solvers ready to go deeper • Grandmaster — the ultimate test, only for the brave NEW GAME MODE: SUDOKU X Turn on Sudoku X in Settings for a fresh twist — both main diagonals must also contain 1–9. Hints, notes, and conflict detection all respect the new rules. Diagonals are highlighted subtly on the grid. NEW FEATURES • Auto-fill pencil marks button — toggle all candidate notes with one tap • Statistics charts — solve-time trends, best times per difficulty, games distribution (Swift Charts) • 13 new achievements (34 total) including X Marks the Spot, Diamond Player, Sudoku Legend, and Year of Sudoku • Technique-based difficulty rating — puzzles are now rated by the solving techniques required, not just clue count IMPROVEMENTS • Accurate timer that never drifts when the app is backgrounded • Streak protection notifications no longer fire if you already completed today's challenge • Smoother puzzle generation for harder difficulties • Many bug fixes and visual polish Thank you for playing Sudoku Prime. Got feedback? Email jaccoperetz@gmail.com

Version 1.1 - Major Feature Update NEW FEATURES Achievement System Unlock 29 achievements across 6 categories: Speed, Accuracy, Streaks, Volume, Difficulty, and Special. Each unlock comes with a beautiful celebration animation. Smart Notifications Enable daily challenge reminders at 9 AM and streak protection alerts at 11 PM to keep your winning streak alive. Enhanced Tutorial Comprehensive 10-page interactive guide covering all game features, from basic rules to advanced strategies. Strategy Guide with Visual Examples Master Sudoku techniques from beginner to advanced. Learn Naked Singles, Hidden Singles, Naked Pairs, Pointing Pairs, X-Wing, and more with interactive visual examples. iCloud Sync Your progress, settings, achievements, and streaks automatically sync across all your devices signed in with the same Apple ID. Rate and Share Love the app? Rate us on the App Store or share with friends directly from Settings. IMPROVEMENTS Cleaner statistics view showing your 5 most recent games Enhanced onboarding experience for new players Full Dark Mode optimization across all screens Perfect iPad layout in both portrait and landscape Responsive design for all device sizes Smoother animations and transitions BUG FIXES Improved achievement detection accuracy Better hint purchase tracking Fixed Share functionality Performance optimizations throughout the app Thank you for playing Sudoku Prime! We hope you enjoy this major update.