HoloKen

Also known as Mathdoku or Kendoku, this KenKen game will test your mental arithmetic and challenge your mind. The goal is to fill in the entire grid with numbers while meeting the operation restrictions for each grid cage. Highlights include unlimited KenKen puzzles with different mathematical modes, different number entry modes (cell first or number first), undo functionality, statistics tracking and puzzle screenshots. For Sudoku lovers and puzzle gamers alike.
Puzzles

＊ Auto-generated puzzles with unique solutions from a 4x4 grid to the ultimate 9x9 game
＊ Need a challenge? Try the No operators mode
＊ Try out different mathematical restrictions: addition and subtraction only for the kids, or multiplication to test your prime factorisation
＊ Track your statistics and try to beat your best times

UI Design

＊ Light and dark themes in full screen and landscape mode
＊ Tablet support with stretchable layout

Intuitive controls

＊ Accessible game controls for New Game, Check and Undo
＊ Start a new game even more quickly by setting a default grid size
＊ Quick toggling of pen, pencil and eraser modes makes editing simpler
＊ Quick toggling of number entry mode - either select cell first or number first
＊ Pencil in possibilities in the grid, then long-press the Pen button to enter them all in one go
＊ Undo button for removing multiple mistakes

Hint system

＊ Check progress through the Check button
＊ Highlight duplicates or bad maths through Game Assistance settings
＊ Auto-remove similar pencil marks once a number is penned in
＊ Still need more help? Long-press on grid gives a context menu to show mistakes, reveal cell, reveal cage or show solution

Saving and sharing games

＊ Current game is immediately auto-saved, with an unlimited number of save slots
＊ Like a puzzle? Save a screenshot and share it with a friend (external sdcard access required)