I’d look into Sonarr/Radarr in combination with Jackett (mentioned above)
Jackett is your search engine backend.
Within Sonarr/Radarr you add Jackett as your search Index (don’t know the correct wording sry)
Been using this for quite some time and it works pretty much flawless.
Jackett still requires you to add your torrent sites like TPB, TorrentLeech or TorrentGalaxy, but in my experience it’s a one time setup thing.
Honestly it makes life much more comfortable compared to manual searches on a single tracker.
pretty sure I’ve read that 4.x is mobile friendly/friendlier than 3.10.
Nzb360 is my preference on mobile, I’m on Android though. Also integrates well with Sonarr/Radarr/Jackett!