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GridSum is a logic-based puzzle game where players must arrange numbers on a grid so that rows and columns add up correctly. It’s a blend of Sudoku, crosswords, and quick math – perfect for fans of brain teasers!
GridSum is currently available on:
iOS (iPhone and iPad)
Each puzzle has a 3x3 to 6x6 grid.
Tap two cells to swap numbers.
Each row must sum to its last cell
Each column must do the same
When everything checks out, the whole grid turns green!
Yes! Just tap the same cell again to cancel the selection.
Yes! Each level sets a board size and number range. Higher levels mean larger, more challenging puzzles.
🔒 Do I need an account?
No sign-in is required. Just open the app and start playing! Progress is saved locally.
Yes, local data may be lost if the app is deleted.
Yes! Use iOS/macOS screen recording tools to capture your gameplay. For example, press Command + Shift + 5 on Mac to record a portion of the screen.
A hint system is coming in a future update. For now, try a fresh attempt or take a break—your brain may solve it subconsciously!