Simple MathDoku alternativesSimple MathDoku is a proprietary app for Android. It is free to use. Developed by aojade.AlternativesLibreSudokuSudoku & VariantsSudoku ChallengeGauguinOpen SudokuKSudokuSudokubarSudoku.bestSudokuplus.netSimple SudokuSudoku by Pink PointerHoDoKu