Transdroid

Allows you to manage your torrents. All popular clients are supported: µTorrent,

Transmission, rTorrent, Vuze, Deluge, BitTorrent 6, qBittorrent and many more.

You can view and manage the running torrents and individual files. Adding is

easy via the integrated search, RSS feeds or the barcode scanner. Monitor

progress using the home screen widget or background alarm service.

See also https://f-droid.org/packages/org.transdroid.search and https://f-droid.org/packages/org.transdroid.lite.