I wasn’t sure about Host at first. Zoom became widespread during the pandemic, but that doesn’t necessarily mean people wanted movies centered around other people using it. Still, I have to admit, it gradually won me over. It's not flawless by any means; the characters remain connected on their Zoom calls for longer than anyone would in reality, given what they experience. They spend a lot of time looking at their computers, and when they do move – which isn’t very far –, they carry their laptops with them (one even falls, dragging his computer along, and it somehow lands perfectly to keep following the action). That's not how people would actually react; that’s more like how characters in a screenplay behave. I realize their screens are our way into their world, and without them we wouldn’t see anything, but I find it easier to believe in an evil spirit than in video cameras being everywhere all the time. However, let's get to what works well. The film has a good rhythm. Director and co-writer Rob Savage seems to understand that his concept couldn't sustain itself for much longer, but he doesn’t rush things either. At 56 minutes long, it's short enough to avoid feeling boring, yet lengthy enough to properly introduce the characters. We don't feel like we've known them forever, of course, but there are five main characters, and each comes across as a distinct person with their own personality. What’s more, Host features well-done practical effects and some real scares; the chair that moves while someone is sitting on it reminded me of Poltergeist, and I also liked the footsteps appearing in spilled flour, the bottle flying off and hitting a character's head, the moment when one of them throws a sheet up and it hangs in the shape of a person, and finally the last shot before the computer loses power (there’s another scene I’d rather not describe, hoping it will have the same effect on other viewers as it did on me). Usually, movies like this are weak when it comes to character development and special effects. Host gives us believable characters surrounded by events that convincingly turn them into victims; without realistic effects we wouldn't believe these people were truly in danger, but most of the credit goes to the actors’ performances. If they hadn’t been able to make me care about them, I wouldn’t have worried whether they stayed put or took their laptops with them, but they did, and I do.

Source on TMDB