As this horror film opens a group of teenagers are at a party; one of them has downloaded a phone app, called 'Countdown', that claims to predict when the user will die; the others install it and one of them is somewhat disturbed when it says she has three hours to live; her boyfriend is only predicted slightly longer. This being a horror film she does indeed die. He is injured in a car crash and is worried because he is predicted to die at the time of his surgery. He tells newly qualified nurse Quinn Harris about the app and soon many of the staff have added it... it tells her she has three days to live. At first she laughs it off but when the boyfriend dies she starts to take it seriously. After a chance meeting with a man who has also been given a short time to live she sets about trying to find a way of avoiding her fate. This will involve seeking help from the likes of a nerdy priest and a tech support guy. If that weren't had enough a doctor at work harasses her.
The idea of having somebody trying to avoid a predicted death might not be that original; there are famous examples from antiquity, but having an app make the prediction is a nice update of the idea. The story gets off to a good if predictable start... we have to see a couple of people die as predicted to accept that anybody could take it seriously. The film provides some good tense moments but for a horror film I'd have preferred it if it were a bit scarier. The demons that came for those trying to cheat death should have been the scariest thing about the film; instead that honour goes to the sleazy doctor who tried to take advantage of Quinn. The characters were rather fun; most notably the priest who was really into demons and curses. The acting is solid; particularly Elizabeth Lail as Quinn. Overall I wouldn't say this is a must see but if you want a mildly scary horror film that will pass ninety minutes you could do a lot worse.