Good premise, but weak script...
“Countdown” is a modern horror film about evil consequences arising from innocent actions. Rather than being set in the distant past or in creepy surroundings, this low-budget movie takes place in the present day under ordinary circumstances. The horror springs from the contemporary fascination with and addiction to cellphones.<br /><br />Countdown is an easily downloaded app that tells the user how much time he/she has left to live. Most people learn that death is decades away, and they shrug off the app as just one of many harmless divertissements for the era of the smart phone. Some users, however, get a disturbingly short time to live. Not really believing the app, they nonetheless freak out and take precautions to evade their predicted destiny.<br /><br />One young woman who gets a brief countdown is hospital nurse Quinn Harris (Elizabeth Lail), who downloaded the app with a bunch of friends. At work, Quinn tries to comfort a troubled patient scheduled for surgery who was convinced by the app that he’s going to die under the knife. He does, but under strange circumstances — not in surgery — at the precise time the app predicted. Quinn starts to worry. The app indicates she will die in a few hours.<br /><br />Her efforts to delete the app are fruitless — it seems to have a mind of its own — so she buys a new phone to rid herself of the terrifying app. But the app appears, once again noting the exact time she will die. In the phone store, she meets Matt (Jordan Calloway), who also has downloaded the Countdown app and learned he has only a few hours to live. Together they try to extricate themselves from their nightmare. Their quest leads them to a sarcastic tech guy (Tom Segura) and a young priest (P.J. Byrne).<br /><br />Though the concept isn’t bad, writer/director Justin Dec uses it as a springboard to imitate the “Final Destination” franchise, about the inability to avoid destiny, and even ”The Exorcist.” He also throws in sub-plots about a dead mother, a sexually abusive doctor, a rebellious younger sister, and a “Cliff’s Notes” lesson on curses through the ages. To amp up the terror, he introduces briefly seen humanoid monsters, but by then, the movie has already fallen into the abyss of dopey horror flicks.<br /><br />But it’s Byrne’s over-the-top performance as the priest that truly sinks the film. Treating a life-or-death situation with adolescent glee because he has studied curses endlessly and finally has a chance to confront one firsthand, the priest is inappropriate comic relief at a tense moment in the story.<br /><br />There are no special materials or behind-the-scenes featurettes on this release. A Digital code is included on a paper insert in the 2-disc Blu-ray/DVD Combo Pack. “Countdown” is rated PG-13.
The movie title "Countdown [Blu-ray]," available on Movies & TV, has received an average rating of 4.2 from 10964 reviewers. 
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This title falls under the categories of Movies & TV, Featured Categories, Blu-ray and Horror. 
The additional details include the following in key-value format :
 {"Genre": "Horror, DVD Movie, Blu-ray Movie, Action & Adventure/Thrillers", "Format": "Digital_copy, NTSC, Subtitled", "Contributor": "Zack Schiller, John Morris, Peter Facinelli, Justin Dec, Talitha Bateman, John Rickard, Tichina Arnold, PJ Byrne, Elizabeth Lail, Sean Anders, Jordan CallowayZack Schiller, John Morris, Peter Facinelli, Justin Dec, Talitha Bateman, John Rickard, Tichina Arnold, PJ Byrne, Elizabeth Lail, Sean Anders, Jordan Calloway   See more", "Language": "English (Dolby Digital 5.1), English (DTS-HD Master Audio 5.1)", "Runtime": "1 hour and 31 minutes", "Aspect Ratio": "2.39:1", "MPAA rating": "PG-13 (Parents Strongly Cautioned)", "Product Dimensions": "0.7 x 7.5 x 5.4 inches; 3.39 Ounces", "Director": "Justin Dec", "Media Format": "Digital_copy, NTSC, Subtitled", "Run time": "1 hour and 31 minutes", "Release date": "January 21, 2020", "Actors": "Elizabeth Lail, Jordan Calloway, Talitha Bateman, Tichina Arnold, PJ Byrne", "Producers": "John Rickard, Zack Schiller, John Morris, Sean Anders", "Studio": "Universal Pictures Home Entertainment", "Writers": "Justin Dec", "Number of discs": "2"}

Here is a brief synopsis of the title : When a young nurse (Elizabeth Lail) downloads an app that claims to predict exactly when a person is going to die, it tells her she only has three days to live. With time ticking away and death closing in, she must find a way to save her life before time runs out.Bonus Content:.