Paranormal Activity 4

A friend asked me, "have you seen Paranormal Activity 4?" But how ironic in that he said, he gave me to understand that it is not a good movie and so it was. Surely is the weakest in the series, special effects, acting, the story has its purpose. I thought PA 3 is the latest and I won't be doing another because there we see how it all began with the two sisters being terrorized by the appearance of the house. This is a stuffing that wants to say what happened with Hunter, who now call him Robbie. The only thing good in this movie is Katie's appearance, but it is for a short time, so she fails to save this stupid movie. And the end? What does it mean? From where appeared all those people? Who are they? Again remains a question mark. Is it still a sequel? If so, let's hope it will be better so that fans of the series will not be disappointed.