"Sudoku Brainiak" is a free sudoku game which comes with 1000s of hand-picked puzzles already loaded on your phone so you can play a quick game even if you don't have Internet access.
The features includes:

• 5 levels of difficulties
• preloaded with thousands of puzzles for each difficulty
• the possibility to edit notes on the puzzle
• hint system which lets you check if you're on the way to solve the puzzle
• a clue system which can give you the next move so you're never blocked/li>
• four beautiful themes, making it of of the best looking sudoku game on the market
• high score and social integration with "Scoreloop" so you can compare you times with your friends

If you have any suggestions, bug report, etc. please contact me through the developer site or email as I cannot answer to comments.

Screenshots: