I've tried to set various of these apps up in the past - I used to do tech support; I am a geek - and for whatever reason, I could never get all the parts working right. I assume many people can since they're popular, but it just never clicked for me.

But I have a pretty good workflow - a seedbox running rutorrent which allows me to send magnet links to it just clicking them in Firefox, with emby installed so I can stream from the box - or easily connect via FTP to download when I prefer.

That's the nice thing - there's a number of ways to accomplish the goal, so finding the one that works well for you is what's important.

That said, I don't remember which ones these are, but I think it began with "Sonarr" to download music and the various somewhat-similarly named projects are about finding and downloading various forms of media automatically based on rules or searches or keywords or whatever. Which is nicer than my system of reminders that stuff should drop and I should go look for a torrent for it. :)