Apple Watch app Deadline tells its wearer when they'll die, suggests ways that they might extend their life. Like that episode of The IT Crowd, there are mathematically sound ways in which you can figure out how long you'll live. There are also ways to extend your expected lifespan, and this Apple Watch app knows those ways. As such, this particular app is very, very popular with new Apple Watch wearers. What better way to fully enjoy your new purchase than to find out when you're going to die?