Tangram Curved Puzzle Game comes from Harikrushna parmar. The object is to fill the grid with the curved pieces.
  This is, quite possibly, one of the easiest puzzles ever because as you drag your selected piece over the grid, the program will not let you place it just any where. It can only be placed in the correct spot.
Still, the colors and shapes are attractive.

https://itunes.apple.com/us/app/tangram-curved-puzzle-game/id1313225373"mt=8

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