Or found footage or shaky cam or whatever else you want to call it. One thing is for sure: It is low budget and it shows. That doesn't mean that some of the "exorcisms" does not look interesting in itself. But it feels like an episodic (and is kind of build that way too) TV show, where you get the exorcism of the week segment ... over and over again. Until the last one of course ... Not that the end of the movie itself will satisfy people either.
If you give the filmmakers a break for the low budget, I'm not sure if you'll give them one for the weak structure this has. Also the camera shaking can make you dizzy or at least annoy and unnerve you a lot. It is called horror, but sometimes that "works" for all the wrong reasons in this movie ...