Sudoku Daily provides daily games at 16 difficulty levels. Novices and experienced players alike will enjoy our extensive feature set, tutorial, and advanced hint system. The more you play, the more you will enjoy Sudoku! For unlimited puzzles, check out our paid Sudoku app. Our multi-stage hint system starts with a gentle reminder to get you back on track, and works up to demonstrate the exact technique to use. Our hints ease those frustrating moments, and teach you how to be a better player. Features include: - 16 difficulty levels, something for everyone - Tutorial teaches you new techniques - Advanced techniques at the higher levels, including X-Wings, sashimi fish, and coloring - Choice of six color schemes - Undo/redo - Automatic or manual pencil marks - Save your game while you try alternatives - Highlighting helps you discover patterns - Game clock; compares your time to other players - Choice of digit styles, including Kanji and Hanzi All games are true Sudoku, with symmetry and a single solution that can be discovered by logic alone. If you doubt that a puzzle can be solved by logic, simply have the hint system explain it to you step by step. If you enjoy Sudoku daily, this is the app for you!