Download a cursed phone app that tells you to the second when you're going to die.

Video Review (just after leaving the theater -- no spoilers)

Various people download and, well, you can figure it out. Yes, that's the story pretty much. It's done OK for the simplistic plot, but it would have worked a lot better in 30 minutes instead of a full length movie. In fact, I was thinking this would make a pretty good short story inside an anthology show like Creepshow, but not as a full length movie. An overdose of attempted jump scares. Jar you with loud sound and surprise alone does not by itself scare, it keeps you awake. Not recommended.