This film from the Netherlands begins with a woman listening to her phone messages while driving. She stops at a railroad crossing, gets out, stands in the tracks, and gets run over by the train. Then, there's a very Doctor Who inspired title sequence that goes on bit too long.
The main story is about Anna (Hannah Hoekstra, who looks like a cross between Anne Hathaway and Emma Watson), a young psychology student who downloads a strange App to her phone. She has a young brother who was in an accident and is learning to walk again with the help of a computer device. Soon, Anna's phone begins to cause her problems. It sends an embarrassing video of her best friend, Sophie, to all of her friends and teachers, and the phone begins recording video of her as well, which she discovers when she walks into an electronics store--and she sees herself, naked, on the monitors. Her phone also prompts the suicide of her philosophy teacher. You see, the app is intelligent and is messing with her. But why? Eventually she discovers where the program came from, which ties to the opening scene of the movie.
APP reminds me a lot of the FINAL DESTINATION movies, though not nearly as violent or entertaining.