Brain tickler!
It’s a more interesting version of Sudoku, using actual math. And it has an incredible library of customizations so that you can play it the way you want.

This math-based logic puzzle game offers daily challenges and customizable puzzles of any size and difficulty. It features a unique two-player versus mode and a variety of helpful tools for both logic and math enthusiasts. Enjoy a fun and addictive brain-bending twist on classic grid puzzles.
1.0
September 18, 2026
Calcudoku Daily is a math-based logic puzzle game that provides a daily puzzle and allows users to create custom puzzles. It's designed to be fun and addictive, similar to Sudoku but with added mathematical operations.
Calcudoku Daily uses the same logic grid as Sudoku, where each row and column must contain numbers 1-9 exactly once. However, it adds a layer of complexity with mathematical operations (+, -, x, ÷) within cages on the grid, requiring users to use both logic and math to solve.
The description focuses on the daily puzzle and custom puzzle creation, implying offline play is possible for these core features. The online preview of Mortal Calcudoku would require an internet connection.
No, the app is listed as having no advertisements, meaning it is ad-free.
Calcudoku Daily is available on iPhone, iPad, and iPod, indicating compatibility with Apple's iOS ecosystem.
The app was last updated on September 18, 2026, with version 1.0. This suggests it is a new release, and future updates will depend on the developer's plans.
The app has an age rating of 9+, making it suitable for children aged 9 and older.
The developer emphasizes extensive customization options for almost every aspect of the game, an original puzzle engine that prioritizes fun and solvability, and unique themes that users can create themselves.