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Sudaku vs Sudoku: catalog facts
Sudaku	Sudoku
Free Free and open source under the MIT license.	Free Free and open source under GPL-3.0-or-later.
Android	Android
Applies consequences of user-defined solving patterns Supports 9×9 and 16×16 puzzles	Puzzle difficulty follows logical solving techniques Includes notes, undo and conflict highlighting
Focused on Sudoku solving rather than general puzzle play	Android only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.