Unsane (2018)

Unsane is a 2018 American psychological horror film directed by Steven Soderbergh and written by Jonathan Bernstein and James Greer. The film stars Claire Foy, Joshua Leonard, Jay Pharoah, Juno Temple, Aimee Mullins, and Amy Irving, and follows a woman confined to a mental institution after she is pursued by a stalker. The film was shot entirely on the iPhone 7 Plus.