This is an implementation of Conway's Life Game for iOS.
This is an excellent app to use if you are covering the subject in your Computer Science classes or if you are simply curious as to what sort of patterns might emerge from a few simple finger taps.
This version of Life allows you to zoom in on the grid with a reverse pinch to allow for fine grained taps on the cells you wish to mark as "Live" or "Dead". A slider allows you to increase/decrease the speed at which the grid will process the next generation's fate.
Also, the color of cell will darken slightly when it has less than 3 neighbors, allowing for a more intriguing visual experience.