It doesn't time your run. It's for when your time runs out. That's one of the slogans being used for a shocking new device called the Quitbit, a macabre piece of wearable tech that pinpoints the exact moment in the future when you'll shuffle off this mortal coil.
It's like a Fitbit, but different. Very, very different. When your time is almost up, the Quitbit sends a notification alerting you that it's time to start preparing for your final goodbye.