undertone (2026) is a Horror, Mystery film that follows the host of a popular paranormal podcast becomes haunted by terrifying recordings mysteriously sent her way. Currently, you can watch undertone on HBO Max Amazon Channel, HBO Max, Amazon Video, Apple TV Store. Streaming availability may vary by country and platform over time. It has a user rating of 6.1 out of 10 from 309 votes. Fans of horror movies may also want to explore similar titles below.