Sudoku Octangles: Numbers Game comes from Amr Hassan.  The object is to place the numbers in the spaces to form a Latin Square (very similar to sudoku).
There are two game: Sum and multiplication.  The little numbers in the grid are either the sum of the surrounding 4 numbers or the product.
The grid sizes go from 3x3 to 9x9.

According to the Leaderboard......practically nobody has played this game.  I think it's pretty good.https://apps.apple.com/us/app/sudoku-octangles-numbers-game/id1480851707

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