FastSudoku

Sudoku that gets out of your way. No clutter, no pop-ups, no forced tutorial. Open the app, pick a difficulty, and solve. Every game saves itself, so you can stop mid-puzzle and pick it back up later. Play your way • Four difficulty levels, from a quick Easy to a proper Expert • Modern mode flags mistakes as you make them • Oldskool mode says nothing until the end, the way paper does • Pencil marks and unlimited undo From the page to your phone Point your camera at a Sudoku in a newspaper or puzzle book and the app reads it in. Or type one in by hand. Finish it here with a clean grid and a real keypad. A sense of how you're doing A quiet pace bar shows whether you're ahead of or behind your usual time at that difficulty. It's about your own solving, not a global leaderboard. Personal bests and solve stats are there if you want them, easy to ignore if you don't. Race a friend Send a link and you both solve the same puzzle. No account, no sign-up. Upload See a game you like? Upload it, we will grade it and you can play it. Nice to look at A flat, geometric design with proper light and dark themes. Built for iPhone, portrait, one thumb.