Wouldn't it be great if your smartphone could automatically silence itself when you're at the movies? Now it can. Introducing Cinemute, the app that mutes your phone when you're at a movie theater so you don't have to. No more embarrassing phone calls or texts mid-movie after you realize you forgot to silence your phone. Cinemute has you covered. Features: Automatic mute/unmute at any movie theater. Cinemute knows which theaters are near you, no setup required. Near-zero impact on battery life. Cinemute's Cinema-Detect algorithm is specifically designed to preserve your phone's precious battery life."Blacklist" selected theaters so Cinemute will ignore them in the future. Permissions. Location: Cinemute uses battery-saving APIs for device location to detect when it is at a movie theater.