Futurama Death Clock

So, during his final days as a physical entity on Earth, PKD’s bodily processes were being maintained solely by technology. He was being controlled by a machine. The author of Do Androids Dream of Electric Sheep? would have enjoyed the irony in that.

All that kept him going was a wish that was more mechanical than emotional. He wished to be reunited with Bee, his mate, with Chrono, his son, and with Stony Stevenson, his best and only friend.

All men are doomed to spend most of their existence among the dead.

An application called Deadline goes a step further, telling you how many years of life you have left, given your current habits.