Kakuro, also known as cross sums, is a Japanese puzzle game that will put your mental agility to the test. The game combines the principles of Sudoku and crossword puzzles, requiring you to find the right combination of numbers to match the clue written on the edge of the grid. Each digit must be unique in any given sum, and you win the game when the grid is completed with the correct digits in every cell.

Despite the simple-looking rules, the grids can be very complicated, making it an engaging and challenging puzzle game. With hundreds of available levels, you can challenge yourself and evaluate your logic with Easy, Medium, Hard, and Genius modes. The game has a simple and functional interface, allowing you to play comfortably. You can also adjust the help system to your style of play, and there are no locked levels, so you can play as you want. The game also has an autosave feature, allowing you to continue your game whenever you like.

Kakuro is available for free on Android, making it accessible to anyone who wants to challenge themselves with a unique and exciting puzzle game.