The Killer App

I made an app that predicts life expectancy. I sent it to my dorm's group chat for my roommates to try. A roommate downloaded it. She shoved her phone at me, eyes wide: 'Are you trying to mess with me?' The app displayed 'Remaining time: Zero years, zero months, one day, and three hours.' I just wanted them to test my product, but it became a 'curse,' leaving me embarrassed and helpless.