While the movie is definitely derivative (i.e. "The Babadook" on a phone), the acting is above average, the creature effects are not bad, and there are a few cleverly done creepy scenes using the device's camera.
I'm not sure why they made Oliver an autistic pre-teen, but actor Azhy Robertson makes it believable. And is it just me, or is anybody else sick and tired of "school yard bullies harassing the child lead" trope?!?
In the film's climax, there is a scene that took my by surprise in a good way (I've seen it all so I give any film kudos if it can pull that off). That actually had me take another look at the movie and I liked it more.