Countdown initially became a horror movie that seemed to be ridiculous upon entry, but luckily ends up knowing that and delivers on what it really is, a horror-comedy.
Countdown's premise is that when people download an app, they receive a countdown of how long they have left to live. While some are told they live for a long time, others realize they only have a few days or hours. The latter gets scared of their fate and tries to alter it, which only causes demons to hate that and go kill them themselves.
Yes, the concept naturally will make your eyes roll and have you unable to take any of it seriously. Luckily, the movie is aware that, and tries to lean into that awareness. It starts out as feeling like its suppose to be serious, but as you begin to laugh at its ridiculousness, so does the movie.
As self-aware as it was, it never went completely over-the-top to bring out the best comedic moments that it could've achieved. It's certainly comedic, but its jokes feel like its meant for its PG-13 rating. That's all fine and good, but it could've pushed the limits in order to try to get even crazier to where it almost feels like an R-rated horror-comedy for a PG-13 crowd.
As for the horror elements, they're as typical as they come. The scares are all in dark halls and rooms where the victims are by themselves, where predictably timed jump scares from demons are waiting to happen. Maybe one or two will work for some audiences, but you will never feel all that scared. Luckily, it's not meant to be a straight horror movie, because then the movie just would not work.
As for the story, it's good enough. It tries to be a story of sisters rekindling their relationship as they battle the demons that are after them together, but its never going to get you invested. Elizabeth Lail and Talitha Bateman play sisters Quinn and Jordan, who both do a solid job at keeping you entertained. But the story still isn't enough despite them working hard to keep you invested. Mainly, you'll want to see this only for the hijinks.
That's all I can really say about this one. What I thought was going to be a movie with a lame concept ended up being a silly, fun time to have with your friends. There isn't really a horror movie coming out for Halloween, but at least there's a somewhat entertaining one to have to play at theaters.