From the App Store
RULES:1. Find all of the Blue squares such that all of the totals match the clues.2. The clues are on the right and across the bottom and are the totals for the respective rows and columns.3. The numbers across the top and on the left are the values for each of the squares.E.g. The first square in a row or column is worth 1, the second 2, the third 3, and so on.Marking a square in Blue will add that square's value to both the row's total and the column's total.
My thoughts

This game is really easy. Perfect for young puzzlers. I did 30 puzzles in about 20 minutes.
The icon for the game shows a 6x6 grid. But all of the puzzles are 4x4. 
https://itunes.apple.com/us/app/kakurasu-sudoku-like-japanese/id1137780328"mt=8

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