CouchPotato is an automatic NZB and torrent downloader.
You can keep a 'want to watch' -list and it will search for NZBs or torrents of these items every X hours.
Once a correct release is found, matching the correct quality, it will send it to SABnzbd or download the .nzb or .torrent to a specified directory.
Default Port: 5050
Auto-Updates within App via built-in updater