Key Features:

** Six Difficulty Levels **
Easy, Medium, Hard, Expert, Master and Extreme.

** Clean Interface **
User-friendly design with large, clear numbers.

** Unlimited Puzzles **
New puzzles generated for endless gameplay.

** Smart Hints **
Helpful hints and optional error highlighting.

** Progress Tracking **
Statistics to monitor your improvement.

** Customizable Settings **
Light and dark themes.

** Offline Play **
Play anytime, anywhere.

** Image/Screenshot Board Import **
Import Sudoku boards from images using specialized convolutional neural networks.

** Uniquely Generated Boards **
On-the-fly puzzle generation for fresh challenges.

** Precise Grading Algorithm **
Algorithm accurately reflecting puzzle difficulty.

** High-Speed Performance **
Utilizing efficient algorithms (DLX, weighted Dijkstra's, adjacency matrices).

** Rich Heuristic Visualizations **
Visual representations of Sudoku solving techniques.