MathDoku Extended is a puzzle game developed by Klokisoft for Android devices. This game is a unique combination of the popular MathDoku game and a calculator, offering an enhanced gaming experience.

Based on the open-source implementation of the well-known sudoku-like game, MathDoku Extended introduces several improvements over the original. One notable addition is the integration of DigitCalc, a standalone calculator that computes all combinations of one-digit numbers to achieve a desired mathematical operation result. When called from the game, DigitCalc provides possible combinations for selected cages, taking into consideration already resolved cells and avoiding duplicates.

Another convenient feature is the ability to fill cells with a long touch, eliminating the need to constantly switch between normal and 'maybe' modes. Simply tap shortly to input a 'maybe' value or perform a long touch to input the solution into a cell.

MathDoku Extended offers a larger game board, bigger 'maybe' numbers, and a 3x3 digit panel for improved visibility. The game also comes with a new theme featuring more vibrant colors.

Some features have been removed from the original version, such as swipe gestures, scrolling text on top, penalty on check progress, and sharing by email.

If you enjoy the added features and enhancements, MathDoku Extended is the perfect choice for you. However, if you prefer the original version or find the removed features essential, you may want to stick with the original MathDoku. For any suggestions or complaints about MathDoku Extended, you can contact Klokisoft at