Magnets is a puzzle that's appeared in various guises in puzzle magazines and on the internet. The Object of the game is to fill the grid provided with a mixture of charged magnets (with positive/negative poles) and blank dominoes (green with two neutral poles). Be sure to satisfy all the clues around the grid, as these indicate the number of positive and negative poles contained in related rows and columns.
Of course two like poles can't occupy adjacent squares, as they would repel. But neutral poles don't repel; so they can be next to any other pole.
This Lite version of the game has 6 modes of play and is available on all your iOS devices. All puzzles are auto-generated; so you'll never need to buy another puzzle book (or make an in-app-purchase).