★ Top Developer (awarded 2011, 2012, 2013 and 2015)★ Sharing the same top quality gameplay, graphics and interface as the rest of our app library, AI Factory's Sudoku is an essential download for any Sudoku or brain training fan! You never need a paper puzzle again! - 2500 Sudoku puzzles over 5 difficulty levels, covering easy through to medium, hard, and extreme levels - Various different modes for notes input to cater for all playing styles -Pre-fill notes option -Auto-clear notes option - Optional hints, undo and board aids - 4 fonts/sets of symbols & 3 boards - Statistics tracking, including fastest times, average times and completion % for each level - Super smooth interface and graphics - Suitable for both Phones and Tablets This free version is supported by 3rd party ads. Ads may use internet connectivity, and therefore subsequent data charges may apply.