There is an app called Tikker which counts down your life so you can make every second count. Made available in April 2014 and boasting thousands of orders, the Tikker allows you to monitor the seconds you have left on earth as they disappear down a black hole. Your estimated time of death is, of course, just that—an estimate. Tikker uses an algorithm like the one used by the federal government to figure a person’s life expectancy and then converts that into a countdown of the years, months, days, minutes, and seconds you have left on this earth. The effect is sobering,