Sonarr is an open-source, self-hosted application for managing and automating TV show downloads. Designed with a user-friendly interface, it helps users keep track of their favorite series by monitoring online indexes for new episodes and automatically downloading them through compatible clients, like BitTorrent or Usenet. Sonarr offers powerful features like episode renaming, custom quality profiles, and metadata management to organize shows neatly within a media library. It supports multiple operating systems and is popular in homelab environments, making it an ideal tool for media enthusiasts looking for a hands-off solution to build and maintain a TV show collection.